Question

Solve by finding square roots.
5x² - 400
-13.5
-$2.52
-2/2, 2/2
-2/3,283

Answer 1

Answer:

See explanation

Step-by-step explanation:

Let the given equation be:

$5 {x}^{2} - 400 = 0$

This implies that:

$5 {x}^{2} = 400$

Divide through by 5 to get;

${x}^{2} = 80$

Take square root to obtain:

$x = \pm \sqrt{80}$

This implies that

$x = \pm4 \sqrt{5}$

$x = - 4 \sqrt{5} \: or \: x = 4 \sqrt{5}$