x^2-19x+18=-8

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Solution for x^2-19x+18=-8 equation:


Simplifying
x2 + -19x + 18 = -8

Reorder the terms:
18 + -19x + x2 = -8

Solving
18 + -19x + x2 = -8

Solving for variable 'x'.

Reorder the terms:
18 + 8 + -19x + x2 = -8 + 8

Combine like terms: 18 + 8 = 26
26 + -19x + x2 = -8 + 8

Combine like terms: -8 + 8 = 0
26 + -19x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-26' to each side of the equation.
26 + -19x + -26 + x2 = 0 + -26

Reorder the terms:
26 + -26 + -19x + x2 = 0 + -26

Combine like terms: 26 + -26 = 0
0 + -19x + x2 = 0 + -26
-19x + x2 = 0 + -26

Combine like terms: 0 + -26 = -26
-19x + x2 = -26

The x term is -19x.  Take half its coefficient (-9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
-19x + 90.25 + x2 = -26 + 90.25

Reorder the terms:
90.25 + -19x + x2 = -26 + 90.25

Combine like terms: -26 + 90.25 = 64.25
90.25 + -19x + x2 = 64.25

Factor a perfect square on the left side:
(x + -9.5)(x + -9.5) = 64.25

Calculate the square root of the right side: 8.015609771

Break this problem into two subproblems by setting 
(x + -9.5) equal to 8.015609771 and -8.015609771.

Subproblem 1

x + -9.5 = 8.015609771 Simplifying x + -9.5 = 8.015609771 Reorder the terms: -9.5 + x = 8.015609771 Solving -9.5 + x = 8.015609771 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + x = 8.015609771 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = 8.015609771 + 9.5 x = 8.015609771 + 9.5 Combine like terms: 8.015609771 + 9.5 = 17.515609771 x = 17.515609771 Simplifying x = 17.515609771

Subproblem 2

x + -9.5 = -8.015609771 Simplifying x + -9.5 = -8.015609771 Reorder the terms: -9.5 + x = -8.015609771 Solving -9.5 + x = -8.015609771 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + x = -8.015609771 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = -8.015609771 + 9.5 x = -8.015609771 + 9.5 Combine like terms: -8.015609771 + 9.5 = 1.484390229 x = 1.484390229 Simplifying x = 1.484390229

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.515609771, 1.484390229}

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