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

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Answer 1 · 2015-06-08T12:24:17

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

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

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

How do you combine (-18x^2 + 4x - 16) - (15x^2 + 4x - 13)(−18x2+4x−16)−(15x2+4x−13) (-18x^2 + 4x - 16) - (15x^2 + 4x - 13)?