Solve for x: 2xsquared+4x-16=0

2x² + 4x - 16 = 0

2 (x²) + 2 (2x) - 2 (8) = 0

2 (x² + 2x - 8) = 0

2 2

x² + 2x - 8 = 0

x = - (2) ± √ ((2) ² - 4 (1) (-8))

2 (1)

x = - 2 ± √ (4 + 32)

2

x = - 2 ± √ (36)

2

x = - 2 ± 6

2

x = - 1 ± 3

x = - 1 + 3 U x = - 1 - 3

x = 2 x = - 4