Question

$2 x^{2} -800=$

Answer 1

2x² - 800 = 
2x² = 800
x² =  800 
          2
x² = 400
x = $\sqrt{400}$
x = + 20

Bons estudos..(;

Answer 2

Oie, Td Bom?!

2x² - 800 = 0

2x² = 800

x² = 800/2

x² = 400

x = ± √400

x = ± 20

S = {- 20 , 20}

Att. Makaveli1996