Question

Find the roots of x2-4x-8 = 0 by the method of completing square.

Answer 1

Answer:

hi mate here is ur ans

Step-by-step explanation:

X²-4x -8 = 0

x²-4x = 8

x²-4x+4 = 8+4 = 12

(x-2)² = 12

x-2 =√12 = +2√3 or -2√3

x = -2√3+2 or x = 2√3+2

hence, x+2√3-2 = 0

x-2√3-2 = 0

plss mark me as brainlist or thnx to my ans

Answer 2

Answer:

x=2√3-2

Step-by-step explanation:

X²-4x -8 = 0

x²-4x = 8  

x²-4x+4 = 8+4 = 12

(x-2)² = 12

x-2 =√12 = +2√3 or -2√3

x = -2√3+2 or x = 2√3+2

hence, x+2√3-2 = 0

x-2√3-2 = 0

plss mark me as brainlist or thnx to my ans