5x(x-26)=63

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Solution for 5x(x-26)=63 equation:


Simplifying
5x(x + -26) = 63

Reorder the terms:
5x(-26 + x) = 63
(-26 * 5x + x * 5x) = 63
(-130x + 5x2) = 63

Solving
-130x + 5x2 = 63

Solving for variable 'x'.

Reorder the terms:
-63 + -130x + 5x2 = 63 + -63

Combine like terms: 63 + -63 = 0
-63 + -130x + 5x2 = 0

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
-12.6 + -26x + x2 = 0

Move the constant term to the right:

Add '12.6' to each side of the equation.
-12.6 + -26x + 12.6 + x2 = 0 + 12.6

Reorder the terms:
-12.6 + 12.6 + -26x + x2 = 0 + 12.6

Combine like terms: -12.6 + 12.6 = 0.0
0.0 + -26x + x2 = 0 + 12.6
-26x + x2 = 0 + 12.6

Combine like terms: 0 + 12.6 = 12.6
-26x + x2 = 12.6

The x term is -26x.  Take half its coefficient (-13).
Square it (169) and add it to both sides.

Add '169' to each side of the equation.
-26x + 169 + x2 = 12.6 + 169

Reorder the terms:
169 + -26x + x2 = 12.6 + 169

Combine like terms: 12.6 + 169 = 181.6
169 + -26x + x2 = 181.6

Factor a perfect square on the left side:
(x + -13)(x + -13) = 181.6

Calculate the square root of the right side: 13.475904422

Break this problem into two subproblems by setting 
(x + -13) equal to 13.475904422 and -13.475904422.

Subproblem 1

x + -13 = 13.475904422 Simplifying x + -13 = 13.475904422 Reorder the terms: -13 + x = 13.475904422 Solving -13 + x = 13.475904422 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = 13.475904422 + 13 Combine like terms: -13 + 13 = 0 0 + x = 13.475904422 + 13 x = 13.475904422 + 13 Combine like terms: 13.475904422 + 13 = 26.475904422 x = 26.475904422 Simplifying x = 26.475904422

Subproblem 2

x + -13 = -13.475904422 Simplifying x + -13 = -13.475904422 Reorder the terms: -13 + x = -13.475904422 Solving -13 + x = -13.475904422 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = -13.475904422 + 13 Combine like terms: -13 + 13 = 0 0 + x = -13.475904422 + 13 x = -13.475904422 + 13 Combine like terms: -13.475904422 + 13 = -0.475904422 x = -0.475904422 Simplifying x = -0.475904422

Solution

The solution to the problem is based on the solutions from the subproblems. x = {26.475904422, -0.475904422}

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