Answer:
x = 0 or x = -22
Step-by-step explanation by completing the square:
Solve for x:
4 x^2 + 88 x = 0
Divide both sides by 4:
x^2 + 22 x = 0
Add 121 to both sides:
x^2 + 22 x + 121 = 121
Write the left hand side as a square:
(x + 11)^2 = 121
Take the square root of both sides:
x + 11 = 11 or x + 11 = -11
Subtract 11 from both sides:
x = 0 or x + 11 = -11
Subtract 11 from both sides:
Answer: x = 0 or x = -22
