Question

Rewrite the equation by completing the square.
x? - 8x + 7 = 0
(x + __)^2 = 0

Answer 1

(x - 4)² - 9 = 0

Explanation:

x² - 8x + 7 = 0

To complete the square

add/subtract ( half the coefficient of the x- term)² to x² - 8x

x² + 2(- 4)x + 16 - 16 + 7 = 0

(x - 4)² - 9 = 0