Question

Solve each equation by completing the square. x²-8 x-20=0 .

Answer 1

x² - 8x - 20 = 0

x² - 8x = 20

x² - 8x + 16 = 36

(x - 4)² = 36

x - 4 = ±6

x = 4 ± 6 = -2, 10