Find the sum or difference.
-$$\left( 3 a ^ { 4 } - 8 a ^ { 3 } \right) + \left( 6 a ^ { 4 } + 5 a ^ { 3 } \right)$$
A) $6 a ^ { 14 }$

B) $9 a ^ { 8 } - 3 a ^ { 6 }$

C) $6 a ^ { 7 }$

D) $9 a ^ { 4 } - 3 a ^ { 3 }$

Question

Find the sum or difference.
-$$\left( 3 a ^ { 4 } - 8 a ^ { 3 } \right) + \left( 6 a ^ { 4 } + 5 a ^ { 3 } \right)$$
A) $6 a ^ { 14 }$

B) $9 a ^ { 8 } - 3 a ^ { 6 }$

C) $6 a ^ { 7 }$

D) $9 a ^ { 4 } - 3 a ^ { 3 }$

Quizplus · Accepted Answer

When adding polynomials, you combine like terms. Here, $3a^4 + 6a^4 = 9a^4$ and $-8a^3 + 5a^3 = -3a^3$, resulting in $9a^4 - 3a^3$.

Find the Sum or Difference (3a4−8a3)+(6a4+5a3)\left( 3 a ^ { 4 } - 8 a ^ { 3 } \right) + \left( 6 a ^ { 4 } + 5 a ^ { 3 } \right)(3a4−8a3)+(6a4+5a3)