Use a vertical format to add the polynomials.
-$\begin{array} { l }
9 x ^ { 8 } - 4 x ^ { 7 } - 4 x ^ { 6 } - 7 \
2 x ^ { 8 } - 6 x ^ { 7 } - 9 x ^ { 6 } + 2 \
\hline
\end{array}$
A) $11 x ^ { 8 } - 10 x ^ { 7 } - 13 x ^ { 6 } - 5$
B) $- 12 x ^ { 42 } - 5$
C)- $- 13 x ^ { 8 } - 13 x ^ { 7 } + 11 x ^ { 6 } - 2$
D) $11 x ^ { 16 } - 10 x ^ { 14 } - 13 x ^ { 12 } - 5$

Question

Use a vertical format to add the polynomials.
-$\begin{array} { l } 
9 x ^ { 8 } - 4 x ^ { 7 } - 4 x ^ { 6 } - 7 \
2 x ^ { 8 } - 6 x ^ { 7 } - 9 x ^ { 6 } + 2 \
\hline
\end{array}$
A) $11 x ^ { 8 } - 10 x ^ { 7 } - 13 x ^ { 6 } - 5$
B) $- 12 x ^ { 42 } - 5$
C)- $- 13 x ^ { 8 } - 13 x ^ { 7 } + 11 x ^ { 6 } - 2$
D) $11 x ^ { 16 } - 10 x ^ { 14 } - 13 x ^ { 12 } - 5$

Quizplus · Accepted Answer

When adding polynomials vertically, you add coefficients of like terms: $9x^8 + 2x^8 = 11x^8$, $-4x^7 - 6x^7 = -10x^7$, $-4x^6 - 9x^6 = -13x^6$, and $-7 + 2 = -5$.

Use a Vertical Format to Add the Polynomials 9x8−4x7−4x6−72x8−6x7−9x6+2\begin{array} { l } 9 x ^ { 8 } - 4 x ^ { 7 } - 4 x ^ { 6 } - 7 \\2 x ^ { 8 } - 6 x ^ { 7 } - 9 x ^ { 6 } + 2 \\\hline\end{array}9x8−4x7−4x6−72x8−6x7−9x6+2​​

Use a Vertical Format to Add the Polynomials $\begin{array} { l } 9 x ^ { 8 } - 4 x ^ { 7 } - 4 x ^ { 6 } - 7 \\2 x ^ { 8 } - 6 x ^ { 7 } - 9 x ^ { 6 } + 2 \\\hline\end{array}$