0=-2x^2+4x+16

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Solution for 0=-2x^2+4x+16 equation: 


Simplifying
0 = -2x2 + 4x + 16

Reorder the terms:
0 = 16 + 4x + -2x2

Solving
0 = 16 + 4x + -2x2

Solving for variable 'x'.

Combine like terms: 0 + -16 = -16
-16 + -4x + 2x2 = 16 + 4x + -2x2 + -16 + -4x + 2x2

Reorder the terms:
-16 + -4x + 2x2 = 16 + -16 + 4x + -4x + -2x2 + 2x2

Combine like terms: 16 + -16 = 0
-16 + -4x + 2x2 = 0 + 4x + -4x + -2x2 + 2x2
-16 + -4x + 2x2 = 4x + -4x + -2x2 + 2x2

Combine like terms: 4x + -4x = 0
-16 + -4x + 2x2 = 0 + -2x2 + 2x2
-16 + -4x + 2x2 = -2x2 + 2x2

Combine like terms: -2x2 + 2x2 = 0
-16 + -4x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-8 + -2x + x2) = 0

Factor a trinomial.
2((-2 + -1x)(4 + -1x)) = 0

Ignore the factor 2.

Subproblem 1
Set the factor '(-2 + -1x)' equal to zero and attempt to solve:

Simplifying
-2 + -1x = 0

Solving
-2 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '2' to each side of the equation.
-2 + 2 + -1x = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1x = 0 + 2
-1x = 0 + 2

Combine like terms: 0 + 2 = 2
-1x = 2

Divide each side by '-1'.
x = -2

Simplifying
x = -2

Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve:

Simplifying
4 + -1x = 0

Solving
4 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + -1x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1x = 0 + -4
-1x = 0 + -4

Combine like terms: 0 + -4 = -4
-1x = -4

Divide each side by '-1'.
x = 4

Simplifying
x = 4
Solution
x = {-2, 4}

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