Question

From the sum of 3x2 -5x +2 and -5x2

-8x +6, subtract 4x2

-9x+7.​

Answer 1

Answer:

Step-by-step explanation:

( 3x^2 - 5x + 2 ) + ( - 5x^2 - 8x + 6)

3x^2 -5x^2 - 5x - 8x +2 + 6

-2x^2 - 13x + 8

( -2x^2 - 13x + 8 ) - ( 4x^2 - 9x + 7 )

-2x^2 - 13x +8 -4x^2 +9x - 7

-2x^2 - 4x^2 - 13x + 9x +8 - 7

- 6x^2 - 4x + 1

Hope this answer helps you friend ♥️

Answer 2

Answer:

$6x^{2} +4x-1$

Step-by-step explanation:

$3x^{2} -5x+2+(-5x^{2})-8x+6-(4x^{2} -9x+7)\\=3x^{2} -5x+2-5x^{2} -8x+6-4x^{2} +9x-7\\=-2x^{2} -13x+8-4x^{2} +9x-7\\=-6x^{2} -4x+1\\=6x^{2} +4x-1$

I have changed the negative sign of $x^{2}$