Question

Solve: (3x^4 − 3x) − (3x − 3x^4 )?

a
6x^4
b
6x^4 + 6x
c
6x^4 - 6
d
6x^4 - 6x

Answer 1

D.
`6x^(4) -6x`

Solution:

`(3x^(4) -3x) -(3x -3x^(4)) \\ 3x^(4) -3x -3x +3x^(4) \\ (3 + 3)x^(4) +(-3 -3)x \\ 6x^(4) -6x`

Answer 2

Option D is the correct answer

Explanation:

`(3 {x}^(4) - 3x) - (3x - 3 {x}^(4) ) \\ \\ = 3 {x}^(4) - 3x - 3x + 3 {x}^(4) \\ \\ = 3 {x}^(4) + 3 {x}^(4) - 3x - 3x \\ \\ \huge \red{= 6 {x}^(4) - 6x }`