Question

Add blank to each side of x^2-8x=9

Answer 1

Explanation:

To complete the square, take half of the second coefficient, square it, then add the result to both sides.

(-8/2)² = (-4)² = 16

x² − 8x + 16 = 9 + 16

Solving:

(x − 4)² = 25

x − 4 = ±5

x = 4 ± 5

x = -1 or 9

Answer 2

part 1: x^2 + -8 x=9

part 2: Add 16 to each side

part 3: (x-4)^2 =25

part 4: -1 and 9