Question

cimco x ao quadrado menos 500

Answer 1

5x²-500 =

5x²=500

x²= 500\5

x²=100

x=10

Answer 2

$5x^2-500=0\\ \\ 5x^2=500\\ \\ x^2={500\over5}\\ \\ x^2=100\\ \\ x=\pm\sqrt{100} \\ \\ x=\pm10$