Find the sum or difference.
-$$\left( 5 x ^ { 4 } - 7 x ^ { 2 } + x \right) - \left( 9 x ^ { 3 } + 6 x ^ { 2 } + 2 x \right) + \left( 5 x ^ { 2 } - x \right)$$
A) $- 1 x ^ { 5 } + 7 x ^ { 4 } - 2 x$
B) $5 x ^ { 4 } - 9 x ^ { 3 } - 6 x ^ { 2 } + 2 x$
C) $5 x ^ { 4 } - 9 x ^ { 3 } - 8 x ^ { 2 } - 2 x$
D) $5 x ^ { 4 } + 9 x ^ { 3 } - 18 x ^ { 2 } - 2 x$

Question

Quizplus · Accepted Answer

To find the sum or difference, combine like terms: $5x^4 - 9x^3 - 7x^2 + 6x^2 + x - 2x + 5x^2 - x = 5x^4 - 9x^3 - 8x^2 - 2x$.

Find the Sum or Difference (5x4−7x2+x)−(9x3+6x2+2x)+(5x2−x)\left( 5 x ^ { 4 } - 7 x ^ { 2 } + x \right) - \left( 9 x ^ { 3 } + 6 x ^ { 2 } + 2 x \right) + \left( 5 x ^ { 2 } - x \right)(5x4−7x2+x)−(9x3+6x2+2x)+(5x2−x)

Find the Sum or Difference $\left( 5 x ^ { 4 } - 7 x ^ { 2 } + x \right) - \left( 9 x ^ { 3 } + 6 x ^ { 2 } + 2 x \right) + \left( 5 x ^ { 2 } - x \right)$