Question

Choose the correct simplification of (4x^3 − 3x − 7) + (3x^3 + 5x + 3).

A. 7x3 − 2x − 4
B. x3 − 8x − 10
C. 7x3 + 2x − 4
D. x3 + 8x + 10

Answer 1

C

Answer 2

\[ (4x^3 − 3x − 7) + (3x^3 + 5x + 3)\]
expand out
\[ 4x^3 − 3x − 7 +3x^3 + 5x + 3\]
combine like terms
\[4x^3+3x^3− 3x+ 5x− 7+ 3\]
\[7x^3+2x− 4\]

Agree with C ! :)