Question

Evaluate.

(a − 2b)^3 when a = −2 and b = −1/2

Answer 1

the answer is 1

Explanation:

(a-2b)^3

(-2-2*-1/2)^3

(-2+1)^3

(-1)^3

=1

Answer 2

The evaluated result of the expression is -1

Using the expression given for our Calculation;

• (a - 2b)³
• a = -2 ; b = -1/2

Substitute a and b into the expression ;

(-2 - 2(-1/2))³

(-2 - (-1))³

(-2 + 1)³

(-1)³

= -1 × -1 × -1

= -1

Hence, the expression is -1