Subtract.
-$$\left( 3 x ^ { 9 } - 2 x ^ { 8 } + 9 x ^ { 7 } + 4 \right) - \left( 8 x ^ { 9 } + 4 x ^ { 8 } + 5 x ^ { 7 } + 8 \right)$$
A) $- 5 x ^ { 9 } - 6 x ^ { 8 } + 4 x ^ { 7 } - 4$
B) $- 5 x ^ { 9 } + 2 x ^ { 8 } + 14 x ^ { 7 } + 12$
C) $11 x ^ { 9 } + 2 x ^ { 8 } + 14 x ^ { 7 } + 12$
D) $11 x ^ { 9 } + 2 x ^ { 8 } + 14 x ^ { 7 } - 4$

Question

Quizplus · Accepted Answer

Subtracting the second polynomial from the first, term by term, gives: $3x^9 - 8x^9 = -5x^9$, $-2x^8 - 4x^8 = -6x^8$, $9x^7 - 5x^7 = 4x^7$, and $4 - 8 = -4$.

Subtract - (3x9−2x8+9x7+4)−(8x9+4x8+5x7+8)\left( 3 x ^ { 9 } - 2 x ^ { 8 } + 9 x ^ { 7 } + 4 \right) - \left( 8 x ^ { 9 } + 4 x ^ { 8 } + 5 x ^ { 7 } + 8 \right)(3x9−2x8+9x7+4)−(8x9+4x8+5x7+8)

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