Question

Find the sum of the three expressions and choose the correct answer.
-2u 3 v + 5uv - 1

7u 3 v - 2u 2 v 2

5u 2 v 2 - uv + 6


The answer choices are.....
A. 5u3v + 3u2v2 + 4uv + 5

B. -5u3v - 3u2v2 + 4uv + 7

C. 5u3v - 3u2v2 + 4uv - 5

Answer 1

$(-2u^3v + 5uv - 1) +(7u^3v - 2u^2v^2) +(5u^2v^2 - uv + 6)=\\\\ -2u^3v + 5uv - 1 +7u^3v - 2u^2v^2 +5u^2v^2 - uv + 6= \\ \\ (7u^3v-2u^3v)+(5u^2v^2-2u^2v^2)+(5uv-uv)+(6-1)=\\\\ \boxed{5u^3v+3u^2v^2+4uv+5}$

Answer 2

The answer will be 5u3v + 3u2v2 + 4uv + 5