Question

Dois x ao quadrado menos noventa igual a oito

Answer 1

2x²-98=0
2x²=98
x²=$\frac{98}{2}$
x²=49
x=$\sqrt{49}$
x=7

Answer 2

2x² - 90 = 8
2x²= 98
x²= 98/2=49
x=√49
x'= + 7
x''= - 7