Question

If x = 4, calculate the value of: 2x³ - 2x² + 2x - x

Answer 1

i dunno try this sorry if its wrong. Answer i got is 16.

Explanation:

since the x = 4 and we need to calculate the value of other numbers. my answer would be this,

2 x 2 x 2 = 6, 2 x 2 = 4 add both values up to get 10, then do 10 x 2 which is 20, - 4 since x is 4.

Also i did this the way you would write it in exponent form.

Answer 2

Explanation:

Putting value of x

2 (4)3 - 2(4)2 + 2(4) - 4

2 (64) - 2(16) + 8 - 4

128 - 32 + 8 - 4

= 100