Question

2: Solve for x:
2x 2= 4x + 8

Answer 1

2x-4x=8-2
-2x=6
X=6/-2
X=-3

Answer 2

Explanation:

2x^2 - 4x - 8 = 0

x^2 - 2x - 8 =0

`x = 2 ( - )(+) \sqrt{2 {}^(2) + 4.1.4 } / 2.1 \\ x = 2( + )( - ) √(4 + 16) / 2 \\ x = 2( - )( + ) √(20) / 2 \\ x = 2( - )( + )2 √(5) / 2 \\ x = 2(1( - )( + ) √(5) / 2 \\ thefore \: x = 1 + √(5) \: or \: x = 1 - √(5)`