Point P 2X 6,X 1 2 IN THE THIRD QUADRANT, SIMPLIFYING X SQUARED X 1 4 9 6X X SQUARED ?

x squared + x + 1 4- 9-6x + x squared.

x+1/2）^2-√(x-3)^2

x+1/2|-|x-3|

p(2x-6, x+1 2) in the third quadrant.

2x-6<=0

x<3x+1/2<=0

x squared + x + 1 4- 9-6x + x squared. x+1/2|-|x-3|

x-1/2-3+x=-7/2

Solution: From the point p(2x-6,x+1 2) in the third quadrant, we get: 2x -6<0, i.e., x -3<0, x +1 2<0

Therefore: (x 2+x+1 4)- 9-6x+x 2)|x +1/2| -x -3|

x -1/2 -(3 -x)

Point p(2x-6, x+1 2) is in the third quadrant.

There are 2x-6<0 x<3

x+1/2<0 x<-1/2

So x<-1 2

x squared + x+1 4 - 9 - 6x + x squared x + x squared x+1 2 - x-3

x-1/2-（3-x ）

2x-6<0 x<3

x+1 2x squared = -x

9-6x+x squared = 3-x

Anyway, I'll figure it out to be -7 2

I also don't guarantee that I'm right

Summary. Point p(x,y) in the second quadrant, simplification x y=??

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2x squared - 3x-7 = 5 2x squared - 3x = 12 6x squared - 9x + 2 = 3 (2x squared - 3x) + 2 = 36 + 2 = 38

2x 2-3x-7=5, 2x 2-3x-12=0, x=(3 soil with 105) 4, x 2=(3x+12) 2, 6x 3-9x+2

6x(3x+12)/2-9x+2

9x^2+36x-9x+2

9(3x+12)/2+27x+2

27x/2+54+27x+2

81x Filial Piety 2+56

81(3土 105) 8+56

691 soil 81 Qiao book chong 105) 8.

Point p(2x-1, 3x-9) is in the fourth quadrant.

2x-1 0 and 3x-9 0

1/2＜x＜3

Root number x square - 6x + 9 + root number 4x square - 4x + 1 = x-3) 2x-1).

3-x+2x-1

2-x

(x+1)(x-2)](2x-4)} x-1) (x+3).

x+1)(x-2)] (x-x-2+2x-4) x+3) (x -1).

x-2) (x + x-6).

x+3).

x-2) (x+3) (x-2).

x+3).

x-1 is known to be x=6, then the original silver cavity formula = x-1=6-1=5

According to Wei Da's theorem, what does it matter.

x1 *x2 = 6

Because it can be written as (x + m) (x + 3).

So there's a root that's -3

So the other root is -2

So m = 2

According to Wei Fangxi, Dading slows down the operation of the reason:

p = x1 + x2 = 5

p = 5

-2 (x squared + 1) + 5 (x + 1) squared -2x = -4x squared + 6x + 3

Bring x=2 in and solve the original =-1

Hello. x's squared (x1)-x(x's squared) x-x's squared-x's squared's x's squared 'x's square's +xx-2x's squared.

1 2-2x1 2 squared.

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1 7 (4x square - 9y square boy) - 10 times (x+y).

x+y=1, so remove the back and multiply the stove (x+y), which becomes 1 7 (4x square - 9y square) - 10

Then each substitution number is worth 13 16-10=-147 16