dallonweekes dallonweekes

07-04-2016
Mathematics

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If M = 5x² + 7x - 4 and N = -3x² - 4x + 5, then M - N equals...

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SmarticalParticals SmarticalParticals

07-04-2016

M - N =

(5x^2+7x-4) - (-3x^2-4x+5)=

Distribute -1 through the second parentheses

5x^2+7x-4 +3x^2+4x-5=

combine like terms

8x^2 + 11x - 9

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