Question

Evaluate. (a−2b)3 when a=−4 and b=−1/2 this question is from k12

Answer 1

- 27

Explanation:

given

(a - 2b)³ ← substitute a = - 4 and b = -
`(1)/(2)` into the expression

= (- 4 - 2( -
`(1)/(2)` ) )³

= ( - 4 + 1)³

= (- 3)³

= - 27