Solve the equation by completing the square. X^2-4x+4=9

Question

asked Jul 4, 2022 133k views

2 Answers

Hcharge · Answer 1 · 2022-07-10T06:15:10+0000

Answer:

x =5 x =-1

Explanation:

X^2-4x+4=9

(x-2)^2 = 9

Take the square root of each side

sqrt((x-2)^2) = sqrt(9)

x-2 = ±3

Add 2 to each side

x-2+2 = 2±3

x = 2+3 x =2-3

x =5 x =-1