Question

Now that you have x² - 8x + 16 = 9 + 16, apply the square root property to the equation.

Answer 1

This is what I found and your cute
Answer
Hi,

a) x² +8x + 16 = 7

(x + 4)² = 7

Take the square root of both sides, remembering the ± sign on the right.

√(x + 4)² = ±√7

x + 4 = ±√7

x = -4 ± √7 <==ANSWER


b) x² -6x +9 = 8

(x - 3)² = 8

√(x - 3)² = ±√8

x - 3 = ±2√2

x = 3 ± 2√2 <==ANSWER

Answer 2

Answer: ( x - 4 )² = 25

The solutions to the quadratic equation

x2 – 8x – 9 = 0. are

-1 and 9