Add.
-$\left(9 \mathrm{x}^{8}-7 \mathrm{x}^{3}+3 \mathrm{x}^{2}+7\right)+\left(4 \mathrm{x}^{7}+5 \mathrm{x}^{3}-4 \mathrm{x}\right)$
A) $9 x^{8}+4 x^{7}-2 x^{3}+3 x^{2}-4 x+7$
B) $9 x^{8}+4 x^{7}+2 x^{3}+3 x^{2}-4 x+7$
C) $13 x^{8}-2 x^{3}+3 x^{2}-4 x+7$
D) $13 x^{8}-12 x^{3}+3 x^{2}-4 x+7$

Question

Quizplus · Accepted Answer

To add the polynomials, combine like terms: $9x^8$ has no like term in the second polynomial, so it remains as is. $4x^7$ also has no like term in the first polynomial, so it remains as is. $-7x^3$ and $5x^3$ combine to $-2x^3$. $3x^2$ has no like term, so it remains as is. $-4x$ has no like term in the first polynomial, so it remains as is. $7$ has no like term, so it remains as is.

Add - (9x8−7x3+3x2+7)+(4x7+5x3−4x)\left(9 \mathrm{x}^{8}-7 \mathrm{x}^{3}+3 \mathrm{x}^{2}+7\right)+\left(4 \mathrm{x}^{7}+5 \mathrm{x}^{3}-4 \mathrm{x}\right)(9x8−7x3+3x2+7)+(4x7+5x3−4x) A) 9x8+4x7−2x3+3x2−4x+79 x^{8}+4 x^{7}-2 x^{3}+3 x^{2}-4 x+79x8+4x7−2x3+3x2−4x+7

Add
- $\left(9 \mathrm{x}^{8}-7 \mathrm{x}^{3}+3 \mathrm{x}^{2}+7\right)+\left(4 \mathrm{x}^{7}+5 \mathrm{x}^{3}-4 \mathrm{x}\right)$ A) $9 x^{8}+4 x^{7}-2 x^{3}+3 x^{2}-4 x+7$