Question

if x = -4 then the value of 2x2

Answer 1

$\huge\mathsf{Given \ -}$

$\mathsf{x \ = \ - 4}$

$\mathsf{2x^2 \ = \ ?}$

$\mathsf{= \ 2(- 4)^2}$

$\mathsf{= \ 2 × -4 × -4}$

$\mathsf{= \ 2 × 16}$
$<marquee>$
$\huge\mathsf\red{\boxed{= \ 32}}$

Answer 2

Hey there

The answer is 32

as x=-4...

2x^2 = 2×(-4) ^2

As we do square of any negative no. it gets positive itself...
therefore (-4) ^2 =16
16×2= 32

Hope it will help...