-2x^2+16x=-18

Solution for -2x^2+16x=-18 equation:

Simplifying
-2x2 + 16x = -18

Reorder the terms:
16x + -2x2 = -18

Solving
16x + -2x2 = -18

Solving for variable 'x'.

Reorder the terms:
18 + 16x + -2x2 = -18 + 18

Combine like terms: -18 + 18 = 0
18 + 16x + -2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(9 + 8x + -1x2) = 0

Factor a trinomial.
2((9 + -1x)(1 + x)) = 0

Ignore the factor 2.
Subproblem 1
Set the factor '(9 + -1x)' equal to zero and attempt to solve:

Simplifying
9 + -1x = 0

Solving
9 + -1x = 0

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

Add '-9' to each side of the equation.
9 + -9 + -1x = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -1x = 0 + -9
-1x = 0 + -9

Combine like terms: 0 + -9 = -9
-1x = -9

Divide each side by '-1'.
x = 9

Simplifying
x = 9
Subproblem 2
Set the factor '(1 + x)' equal to zero and attempt to solve:

Simplifying
1 + x = 0

Solving
1 + x = 0

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

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

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

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

Simplifying
x = -1
Solution
x = {9, -1}