Question

Solve. 5x^2 – 20 = 0

x = 5 and x = 4

x = 4 and x = 2

x = –5 and x = 20

x = 2 and x = –2

Answer 1

2 and -2

Bring the 20 over, divide by 5 and you get x^2 = 4, x = (+ or -) 2