Question

4m4 - 8m3 - 7m) + (4m4 - 7m2 - 5m

Answer 1

`(4m^4-8m^3-7m)+(4m^4-7m^2-5m)\\\\=4m^4-8m^3-7m+4m^4-7m^2-5m\qquad\text{combine like terms}\\\\=(4m^4+4m^4)-8m^3-7m^2+(-7m-5m)\\\\=\boxed{8m^4-8m^3-7m^2-12m}`

Answer 2

8m^4 -8m^3 -7m^2 -12 m

Explanation:

(4m^4 - 8m^3 - 7m) + (4m^4 - 7m^2 - 5m)

I like to line them up vertically. I put 0 in the spots to keep them lined up

4m^4 - 8m^3 +0m^2 -7m

+4m^4 +0m^3 - 7m^2 - 5m

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8m^4 -8m^3 -7m^2 -12 m