Question

If $m=2$ and $n=-2$, find the value of $6m^3+4n^{-2}$

• A. $40$
• B. $49$
• C. $37$
• D. $42$

Answer 1

The correct option is B

$49$

Given : $m=2$ and $n=-2$

$6m^3+4n^{-2}$ = $6(2{)}^3+4(-2{)}^{-2}$

= $6\times 8+\frac{4}{(-2{)}^2}$

= $48+1$ = $49$