Subtract.
-$$\begin{array} { r }
x ^ { 4 } + 8 x ^ { 3 } \
- \left( 15 x ^ { 4 } + 13 x ^ { 3 } \right) \
\hline
\end{array}$$
A) $- 14 x ^ { 4 } - 5 x ^ { 3 }$
B) $34 x ^ { 4 } + 21 x ^ { 3 }$
C) $- 14 x ^ { 4 } + 21 x ^ { 3 }$
D) $- 19 x ^ { 7 }$

Question

Subtract.
-$$\begin{array} { r } 
x ^ { 4 } + 8 x ^ { 3 } \
- \left( 15 x ^ { 4 } + 13 x ^ { 3 } \right) \
\hline
\end{array}$$
A) $- 14 x ^ { 4 } - 5 x ^ { 3 }$
B) $34 x ^ { 4 } + 21 x ^ { 3 }$
C) $- 14 x ^ { 4 } + 21 x ^ { 3 }$
D) $- 19 x ^ { 7 }$

Quizplus · Accepted Answer

Subtracting the polynomials gives $(x^4 + 8x^3) - (15x^4 + 13x^3) = -14x^4 - 5x^3$.

Subtract - x4+8x3−(15x4+13x3)\begin{array} { r } x ^ { 4 } + 8 x ^ { 3 } \\- \left( 15 x ^ { 4 } + 13 x ^ { 3 } \right) \\\hline\end{array}x4+8x3−(15x4+13x3)​​

Subtract
- $\begin{array} { r } x ^ { 4 } + 8 x ^ { 3 } \\- \left( 15 x ^ { 4 } + 13 x ^ { 3 } \right) \\\hline\end{array}$