Simplify.
-$\left( 2.5 x ^ { 3 } - 5.2 x ^ { 2 } - 4 \right) - \left( 8.8 x ^ { 3 } - 3.2 x ^ { 2 } + 3 \right)$
A) $- 6.3 x ^ { 3 } - 2 x ^ { 2 } - 7$
B) $11.3 x ^ { 3 } - 2 x ^ { 2 } - 7$
C) $- 6.3 x ^ { 3 } - 2 x ^ { 2 } + 7$
D) $- 6.3 x ^ { 3 } - 8.4 x ^ { 2 } - 7$

Question

Quizplus · Accepted Answer

Subtracting the second polynomial from the first gives: $2.5x^3 - 5.2x^2 - 4 - (8.8x^3 - 3.2x^2 + 3) = 2.5x^3 - 8.8x^3 - 5.2x^2 + 3.2x^2 - 4 - 3 = -6.3x^3 - 2x^2 - 7$.

Simplify - (2.5x3−5.2x2−4)−(8.8x3−3.2x2+3)\left( 2.5 x ^ { 3 } - 5.2 x ^ { 2 } - 4 \right) - \left( 8.8 x ^ { 3 } - 3.2 x ^ { 2 } + 3 \right)(2.5x3−5.2x2−4)−(8.8x3−3.2x2+3)

Simplify
- $\left( 2.5 x ^ { 3 } - 5.2 x ^ { 2 } - 4 \right) - \left( 8.8 x ^ { 3 } - 3.2 x ^ { 2 } + 3 \right)$