How do you combine $(-18x^2 + 4x - 16) - (15x^2 + 4x - 13)$ ?

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Answer 1 · 2015-06-08T12:24:17

$-18x^2 + 4x - 16 - 15x^2 -4x + 13$

Combining like terms
$=color(blue)(-18x^2 - 15x^2 + color(blue)(4x - 4x) - color(blue)(16 +13$

$=color(blue)(-33x^2 + 0 -color(blue)(3))$
$=-33x^2 -3$

How do you combine (-18x^2 + 4x - 16) - (15x^2 + 4x - 13) (-18x^2 + 4x - 16) - (15x^2 + 4x - 13)?