Add or subtract.
-$$\left( 4 x ^ { 2 } + 7 x - 5 \right) + \left( 5 x ^ { 2 } - 10 x + 13 \right)$$
A) $9 x ^ { 2 } - 3 x + 8$
B) $9 x ^ { 2 } - 17 x + 8$
C) $9 x ^ { 2 } + 3 x + 8$
D) $9 x ^ { 2 } - 3 x + 18$

Question

Quizplus · Accepted Answer

To add the polynomials, combine like terms: $4x^2 + 5x^2 = 9x^2$, $7x - 10x = -3x$, and $-5 + 13 = 8$, resulting in $9x^2 - 3x + 8$.

Add or Subtract (4x2+7x−5)+(5x2−10x+13)\left( 4 x ^ { 2 } + 7 x - 5 \right) + \left( 5 x ^ { 2 } - 10 x + 13 \right)(4x2+7x−5)+(5x2−10x+13)

Add or Subtract $\left( 4 x ^ { 2 } + 7 x - 5 \right) + \left( 5 x ^ { 2 } - 10 x + 13 \right)$