How do you simplify $(-x^2 +9x -2) -(9x^2- 4x+ 4$ )?

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Answer 1 · 2018-03-10T17:11:14

$-10x^2 + 13x - 6$

All you have to do is pretty much subtract the different powered variables $(Ex. x^3, x^2, x)$
so ...
$-x^2 - 9x^2 = -10x^2$

$9x - (-4x) = 13x$

$-2 - 4 = -6$

Answer: $-10x^2 + 13x -6$

Answer 2 · 2018-03-10T17:13:08

$(x^2+9x-2)-(9x^2-4x+4)=-8x^2+13x-6$

$(x^2+9x-2)-(9x^2-4x+4)$
$=x^2+9x-2-9x^2+4x-4$
$=x^2-9x^2+9x+4x-2-4$
$(1-9)x^2+(9+4)x-(2+4)$
$-8x^2+13x-6$

How do you simplify (-x^2 +9x -2) -(9x^2- 4x+ 4(-x^2 +9x -2) -(9x^2- 4x+ 4)?