Perform the operation and write the result in standard form. $\left( 8 x ^ { 4 } - 6 \right) - \left( 5 x ^ { 4 } - 4 x - 9 \right)$
A) $3 x ^ { 4 } - 4 x - 15$
B) $3 x ^ { 4 } + 4 x + 3$
C) $3 x ^ { 8 } + 4 x + 3$
D) $3 x ^ { 8 } - 4 x - 15$
E) $13 x ^ { 8 } - 4 x - 15$

Question

Quizplus · Accepted Answer

Subtracting the second polynomial from the first gives $8x^4 - 6 - (5x^4 - 4x - 9) = 8x^4 - 5x^4 + 4x + 3 = 3x^4 + 4x + 3$.

Perform the Operation and Write the Result in Standard Form (8x4−6)−(5x4−4x−9)\left( 8 x ^ { 4 } - 6 \right) - \left( 5 x ^ { 4 } - 4 x - 9 \right)(8x4−6)−(5x4−4x−9)

Perform the Operation and Write the Result in Standard Form $\left( 8 x ^ { 4 } - 6 \right) - \left( 5 x ^ { 4 } - 4 x - 9 \right)$