Ask the following questions about simplifying evaluation, simple calculation, and factorization

1. Simplification evaluation: 6x squared - (2x+1) (3x-2) + (x+3) (x-3), where x = one-half (to process).

Solution: Original = 6x 2-(6x 2-x-2)+x 2-9=x 2+x-7

When x=1 2, the original formula = 1 4 + 1 2-7 = -25 4

2. Factorization: -4a squared + 24a-36 (to process).

Solution: Original formula = -4 (a 2-6a + 9) = -4 (a-3) 2

3. Simple calculation: to the process).

Original = (10+

4. If the square of x - the square of y - x+y=(x-y) a, then a= x+y-1 directly fill in the answer).

5. Knowing that a+b=1/2, ab=3/8, find the value of the 3rd power of a b+2a squared b + the third power of ab + the third power of ab.

The 3rd power of a b + the square of 2a b + the square of b + the cubic of ab = ab(a 2 + 2ab + b 2) = ab(a + b) 2 = 3 8 * 1 4 = 3 32

You have to learn the factorization in the second year of junior high school!

1,3x'y-[2x'y-(2xyz-x'z)-4x'z]-xyz, where x=-2, y=-3, z=1, primitive=3x'y-[2x'y-(2xyz-x'z)-4x'z]-xyz

3x'y-2x'y+2xyz-x'z+4x'z-xyz

x'y-xyz+3x'z

When x=2, y=3, z=1.

Original formula = 4*(-3)-2*3*1+3*4*1

62,3x+2y)+(4x+3y), where x=5,y+3

Original = 3x+2y+4x+3y=7x+5y

When x=5, y=3.

Original = 5*7+(-3)*5+20

403,2x-3(2x-x)+(2y-y), where x=1, y=2

Untie; Original = 2x-3x+y

When x=1, y=2.

Original = 2*1-3*1+2

14, (5a 2-3b 2) + (a 2 + b 2) - (5a 2 + 3b 2), where a = -1, b = 1

5a^2-3b^2+a^2+b^2-5a^2-3b^2

a^2-5b^2

45,2(a2b+ab2)-2(a2b-1)-2ab2-2, where a=-2, b=2

2a^2b+2ab^2-2a^2b+2-2ab^2-2

0,6,a 2-ab+2b 2=3 Find the value of 2ab-2a 2-4b 2-7.

2ab-2a^2-4b^2-7

2(ab-a^2-2b^2)-7

2(a^2-ab+2b^2)-7

7. If a=2x 2+3xy-2x-3, b=-x 2+xy+2, and the value of 3a+6b has nothing to do with x, find the value of y.

3a+6b=6x^2+9xy-6x-9-6x^2+6xy+12

15xy-6x+3

x(15y-6)+3

8,x+6x^2 -3(x-2/3x^2).where x=-2

9x+6x² -3(x-2/3x²)

9x+6x²-3x+2x²

8x²+6x

209,1 4(-4x 2+2x-8)-(1 2x-1), where x=1 2

1/4(-4x²+2x-8)-(1/2x-1)

x²+1/2x-2-1/2x+1-x²-1

5/4,

Simplification:1（x²-4/x²-4x+4-x-2/x+2）÷x/x-2

2.（a+2/a²-2a-a-1/a²-4a+4）÷4-a/a²-2a

Solve equations. （x²-4/x²-4x+4-x-2/x+2）÷x/x-2

(x-2)(x+2)/(x-2)²-x-2)/(x+2)]÷x/(x-2)

(x+2)/(x-2)-(x-2)/(x+2)]*x-2)/x

x²+4x+4-x²+4x-4)/(x-2)(x+2)*(x-2)/x

8/(x+2)

2.（a+2/a²-2a-a-1/a²-4a+4）÷4-a/a²-2a

(a+2)/a(a-2)-(a-1)/(a-2)²]4-a)/a(a-2)

a²-4-a²+a)/a(a-2)²×a(a-2)/(4-a)

1/(a-2)

1/(2-a)

x(x+9)/x(x+3)+(x-3)(x+3)/(x+3)²

x(x+9)/x(x+3)+(x-3)/(x+3)

x²+9x+x²-3x)/x(x+3)

2x(x+3)/x(x+3)

x+1)²-4=x²-1

x²+2x+1-4=x²-1

2x=2x=1 x=1 The original equation is meaningless.

There is no solution to the original equation.

x+x+2=32

2x=30x=15

3x+4)(2x-3)+(3x-5)(2x-3)=(4x+1)(3x-5)

6x²-x-12+6x²-19x+15=12x²-17x-5

12x²-20x-12x²+17x=-5-3

3x=-8x=8/3

Factorization:

1）.3y²-5xy-2y=(3x+y)(x-2y)（2）.x³-5x²+6x=x(x-2)(x-3)（3）.a²+2a+1-b²=(a+1)²-b²=(a+b+1)(a-b+1)

4）.（x²-2x）²+2（x²-2x）+1=[(x²-2x)+1]²=[(x-1)²]=(x-1)^4

Simplify and Evaluate:

2a+b) -3a-b) +5a(a-b), where a=1 and b=fifth.

2a+b）²-3a-b）²+5a（a-b）=4a²+4ab+b²-(9a²-6ab+b²)+5a²-5ab=5ab

1.(m+n) 2-4m(m+n)+4m2 factor.

m+n-2m)²

n-m)²2.(a-b)-2x(a-b)-x 2(b-a) factoring Removes the following squares.

a-b)(1-2x+x²）

a-b)(1-x)²

3.(x 2+x-6) (x-3) (x+3) (x 2-6-x) fractional simplification.

x+3)(x-2)/(x-3)×(x-3)(x+2)/(x+3)

x-2)(x+2)

x -4 fraction simplification.

1/(x-3)-6/(x+3)(x-3)-(x-1)/x(x+3)

2(x+3)/2(x+3)(x-3)-12/2(x+3)(x-3)-2(x-1)(x-3)/2(x+3)(x-3)

2x+6-12-2(x-3)(x-1)]/2(x+3)(x-3)

2(x-3)(1-x+1)/2(x+3)(x-3)

x/(2x+6)

5.[(x+2) (x 2-2x)-(x-1) (x 2-4x+4)] 4-x) x fractional simplification.

(x+2)/x(x-2)-(x-1)/(x-2)²]x/(4-x)

x²-4-x²+x)/x(x-2)²×x/(4-x)

x-4)/(x-2)²×1/(4-x)

1/(x²-4x+4)

6.(x+2) [x-(5x+4) (1-x)] where x=1 is simplified and then evaluated.

x+2)÷(x-x²-5x-4)/(1-x)

x+2)÷(x+2)²/(x-1)

x-1)/(x+2)

When x=1.

Original = 0 Note that x here can't actually take 1.

7.[x+1-15 (x-1)] x-4) (x-1) where x=(3)-4 under the root number is added by one

x²-1-15)/(x-1)÷(x-4)/(x-1)

x+4)(x-4)/(x-1)×(x-1)/(x-4)

x+4 when x = 3-4.

Original = 3

There are so many questions, you have to give some points, or ask them individually, it's okay...

（1）.3y²-5xy-2y=(3x+y)(x-2y)（2）.x³-5x²+6x=x(x-2)(x-3)（3）.a²+2a+1-b²=(a+1)²-b²=(a+b+1)(a-b+1)

4）.（x²-2x）²+2（x²-2x）+1=[(x²-2x)+1]²=[(x-1)²]=(x-1)^4

Simplify and Evaluate:

2a+b) -3a-b) +5a(a-b), where a=1 and b=fifth.

2a+b）²-3a-b）²+5a（a-b）=4a²+4ab+b²-(9a²-6ab+b²)+5a²-5ab=5ab

118×122

120-2）x（120+2）

Connoisseurs are right, if you don't understand, you can ask! Good luck with your learning.