The problem of square roots in the second year of junior high school, the teacher will talk about it

1.This means that the opposite of the condition of the previous sentence is l, which in this case means "the first perfect square number smaller than this natural number".

2, just a mathematical symbol, square, root and the like, the equation after the equal sign represents the meaning of sqrth.

4.A perfect square number is a number obtained by multiplying an integer by itself, such as 1*1=1, 2*2=4, 3*3=9, where 1, 4, and 9 are perfectly squared. Assuming h is 33, then a number greater than 33 is 34, 35, 36, 37...

Wait and so on, starting from 34, the first perfect square number is 36 = 6 * 6

is a parallelogram.

Because d and e are the midpoints of ab and bc, respectively, de is parallel to ac

Because the point F is on the extension of the CA, the DE is parallel to the AF

Since de is perpendicular to ba, and point d is the midpoint of ba, abe is an isosceles triangle, so bae = b

Because the angle fda= b, so bae= fda, so bf ae because de is parallel to af, bf ae, so the quadrilateral aedf is a parallelogram.

Because ac=6cm, de=6cm

Because BC=10cm, AB=8cm is obtained by using the Pythagorean theorem, so AD=4cm, and AE=5cm is obtained by using the Pythagorean theorem

So the circumference of the AEDF is 16cm

A perfectly squared number is a number whose square root is an integer, such as 49, 36, 25, etc.

sqrt is a definition of the topic, which is the abbreviation of square root, which is the square root.

sqrth is the square root of h.

The reverse is l, which means that the perfect square number smaller than h is l

Detailed enough.

Square root 8 = 2 times root number 2 2 times root number 2 + root number 2 = 3 times root number 2 square root number 8 = 2 times root number 2 root number 30 = 5 times root number 2 2 times root number 2 + 5 times root number 2 = 7 times root number 2

Root number 32 = 4 times root number 2 Root number 128 = 8 times root number 2 4 times root number 2 + 8 times root number 2 = 12 times root number 2

You always write about situations, right?

3 times the root number, 26 times the root number, 2 times

8 times root number 2

1.The cubic root of 64 is (4); The cube root of 3 512 is ( 24 ); The square root of 3 64 is (24).

2.The cube root of 1 2010 is (-1), and the cube root of 2010 is (1).

3.If x = 64, then 3 x = (3 8).

In question 3, x = 8 can be obtained from x = 64, and x can be seen from x to be a non-negative number, so x can only be taken as 8, so 3 x = 3 8].

4.The number of the cube root equal to itself is (-1,0,1), and the number of the cube root greater than itself is (all negative numbers).

5.3 is the square root of (9) and 3 is the cubic root of (-27).

6.If the cube root of 5x+19 is 4, then the square root of 2x+7 is (5).

6 Question Analysis: The cube root of 5x+19 is 4 5x+19=4 =64 5x=64-19=45, x=9 Substituting x=9 into 2x+7 obtains: 2x+7=2 9+7=25, so the square root of 2x+7 is 5].

7.The range of values for a that makes the sentence 2 a + 3 2a a+1 meaningful is (a 2 and a ≠-1).

Question 7 analysis: from 2 a to get a 2 (the non-negativity of the opened square number) from 3 2a a+1 to get a≠-1 in a+1 (the denominator cannot be 0), and a in 2a can be all real numbers, you can get a≠-1 in 2a a+1, so a 2 and a ≠-1].

Hope you can o(o).

1.The following statement is correct (d).

a.5 is the square root of 25.

is the square root of the arithmetic of (3).

c.The square root of (2) is 2.

The square root of is 4.

2.The following is in the correct format (c).

a.√(3)²=3。

b.√(100)=±10。

c.Lag 6 and 1 4 = 5 2.

d.√13²－5²=13－5=8

3.The square root of a number is a, and the number that is 2 greater than this number is (d).

b.√a－2

c.√a+2

4.The following statement: Any number has an arithmetic square root; The square root of the arithmetic of a is; The arithmetic square of (x 5) is x 5;The arithmetic square root of a number must be positive; The square root of the arithmetic must be a non-negative number, where the correct one is (a).

5.In the following format, the number of correct liquid forms is (a).

1).√9=±3；(2).±9=3；(3).√3)²=3；(4).√1/9=1/3；(5).4 and 1 4 = 2 and 1 2

1）x²=361

x=±192）81x²－49=0

81x²=49

9x=±7x=±7/9

3）49(x²+1)=50

49x^2+49=50

49x^2=1

7x=±1x=±1/7

4) (3x 1) = (5) squared.

3x-1=±5

x=（1±5）/3

x1=-4/3，x2=2

2.Knowing that b is a square root of a, then the square root of a is (b) and the arithmetic square root of a is (|b| ）

Solution: (1) Original formula = 1 Wu Chengqing 7 * root number 7 + 2 * root number 7-10 * root number 7 = (1 7 + 2-10) * root number 7 = -55 7 * root number 7

Precursor 2) original formula = 3 * root number 18 + 1 5 * root number 50-4 * root number 1 cavity grip 2) root number 32

9 * root number 2 + root number 2-2 * root number 2] 4 * root number 2 [8 * root number 2] 4 * root number 2

1.From the meaning of the title: 2a-15=a+3 then a=18 So this number is: 441 and its square root is 21

2.From 4a+1>=0 to get a>=, so the smallest integer that can be obtained is 0, and the square of both sides gives x=6 5=;

x-1) 2=9 4 Same as above x-1=3 2=So x=

1.Because the square root of a certain number is 2a-15 and a+3, then (2a-15) 2=(a+3) 2, we get a=18 or 4, because the square root cannot be negative, so we get a=18 by rounding off 4

2.To make sense under the root number, then 4a+1 is greater than or equal to 0, that is, a is greater than or equal to -1 4, then the smallest integer that a can take is 0

3.x= 6 5 x=5 2 or -1 2

9<11<16

5<9- 11<6, 12<9+ 11<13x, y is the decimal part of two numbers, subtract the integer part, that is, the decimal part, so, x=9- 11-5=4- 11

y=9+√11-12=√11-3

So x+y=4- 11+ 11-3=1

The first question you have typed. So I'm not going to answer that.

Question 2 4-4 under the root number 17 = 4 times the root number 4 17 under the root number The third question is under the root number n-n n 2+1=n times the root number under the root number n n 2+1ps: represents the square of n.

Represents n 2 and then 1