Perform the operations and simplify. $\left( 7 x ^ { 3 } - 5 x ^ { 2 } \right) + \left( 7 x ^ { 3 } - 5 x \right)$
A) $ 14 x ^ { 3 } - 5 x ^ { 2 }- 5 x ^ { 3 } $
B) $ 4 x ^ { 3 } $
C)0
D) $ 14 x ^ { 3 } - 5 x ^ { 2 }- 5 x $

Question

Perform the operations and simplify. $\left( 7 x ^ { 3 } - 5 x ^ { 2 } \right) + \left( 7 x ^ { 3 } - 5 x \right)$
A) $ 14 x ^ { 3 } - 5 x ^ { 2 }- 5 x ^ { 3 }  $
B) $ 4 x ^ { 3 } $ 
C)0
D) $ 14 x ^ { 3 } - 5 x ^ { 2 }- 5 x  $

Quizplus · Accepted Answer

We simply combine like terms. 7x^3 + 7x^3 = 14x^3, -5x^2 + 0 = -5x^2, and 0 - 5x = -5x. So the final answer is 14x^3 - 5x^2 - 5x. Option D is the only valid answer choice.

Perform the Operations and Simplify (7x3−5x2)+(7x3−5x)\left( 7 x ^ { 3 } - 5 x ^ { 2 } \right) + \left( 7 x ^ { 3 } - 5 x \right)(7x3−5x2)+(7x3−5x)

Perform the Operations and Simplify $\left( 7 x ^ { 3 } - 5 x ^ { 2 } \right) + \left( 7 x ^ { 3 } - 5 x \right)$