Question

equação 2 grau 5x2= 20

Answer 1

5x²=20
x²=20/5
x²=4
x=raiz de 4
x=2

Answer 2

$5x^2 = 20 \\ x^2 = \frac{20}{5} \\ x^2 = 4 \\ x = \pm \sqrt{4} \\ x = \pm 2$