Respuesta :
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
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: ( x - 4 )² = 25
The solutions to the quadratic equation
x2 – 8x – 9 = 0. are
-1 and 9
