x^2+16x-89=10

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Solution for x^2+16x-89=10 equation:


Simplifying
x2 + 16x + -89 = 10

Reorder the terms:
-89 + 16x + x2 = 10

Solving
-89 + 16x + x2 = 10

Solving for variable 'x'.

Reorder the terms:
-89 + -10 + 16x + x2 = 10 + -10

Combine like terms: -89 + -10 = -99
-99 + 16x + x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-99 + 16x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '99' to each side of the equation.
-99 + 16x + 99 + x2 = 0 + 99

Reorder the terms:
-99 + 99 + 16x + x2 = 0 + 99

Combine like terms: -99 + 99 = 0
0 + 16x + x2 = 0 + 99
16x + x2 = 0 + 99

Combine like terms: 0 + 99 = 99
16x + x2 = 99

The x term is 16x.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16x + 64 + x2 = 99 + 64

Reorder the terms:
64 + 16x + x2 = 99 + 64

Combine like terms: 99 + 64 = 163
64 + 16x + x2 = 163

Factor a perfect square on the left side:
(x + 8)(x + 8) = 163

Calculate the square root of the right side: 12.767145335

Break this problem into two subproblems by setting 
(x + 8) equal to 12.767145335 and -12.767145335.

Subproblem 1

x + 8 = 12.767145335 Simplifying x + 8 = 12.767145335 Reorder the terms: 8 + x = 12.767145335 Solving 8 + x = 12.767145335 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = 12.767145335 + -8 Combine like terms: 8 + -8 = 0 0 + x = 12.767145335 + -8 x = 12.767145335 + -8 Combine like terms: 12.767145335 + -8 = 4.767145335 x = 4.767145335 Simplifying x = 4.767145335

Subproblem 2

x + 8 = -12.767145335 Simplifying x + 8 = -12.767145335 Reorder the terms: 8 + x = -12.767145335 Solving 8 + x = -12.767145335 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = -12.767145335 + -8 Combine like terms: 8 + -8 = 0 0 + x = -12.767145335 + -8 x = -12.767145335 + -8 Combine like terms: -12.767145335 + -8 = -20.767145335 x = -20.767145335 Simplifying x = -20.767145335

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.767145335, -20.767145335}

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