(x)(x-25)=156

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Solution for (x)(x-25)=156 equation:


Simplifying
(x)(x + -25) = 156

Reorder the terms:
x(-25 + x) = 156
(-25 * x + x * x) = 156
(-25x + x2) = 156

Solving
-25x + x2 = 156

Solving for variable 'x'.

Reorder the terms:
-156 + -25x + x2 = 156 + -156

Combine like terms: 156 + -156 = 0
-156 + -25x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '156' to each side of the equation.
-156 + -25x + 156 + x2 = 0 + 156

Reorder the terms:
-156 + 156 + -25x + x2 = 0 + 156

Combine like terms: -156 + 156 = 0
0 + -25x + x2 = 0 + 156
-25x + x2 = 0 + 156

Combine like terms: 0 + 156 = 156
-25x + x2 = 156

The x term is -25x.  Take half its coefficient (-12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
-25x + 156.25 + x2 = 156 + 156.25

Reorder the terms:
156.25 + -25x + x2 = 156 + 156.25

Combine like terms: 156 + 156.25 = 312.25
156.25 + -25x + x2 = 312.25

Factor a perfect square on the left side:
(x + -12.5)(x + -12.5) = 312.25

Calculate the square root of the right side: 17.670597047

Break this problem into two subproblems by setting 
(x + -12.5) equal to 17.670597047 and -17.670597047.

Subproblem 1

x + -12.5 = 17.670597047 Simplifying x + -12.5 = 17.670597047 Reorder the terms: -12.5 + x = 17.670597047 Solving -12.5 + x = 17.670597047 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = 17.670597047 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = 17.670597047 + 12.5 x = 17.670597047 + 12.5 Combine like terms: 17.670597047 + 12.5 = 30.170597047 x = 30.170597047 Simplifying x = 30.170597047

Subproblem 2

x + -12.5 = -17.670597047 Simplifying x + -12.5 = -17.670597047 Reorder the terms: -12.5 + x = -17.670597047 Solving -12.5 + x = -17.670597047 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = -17.670597047 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = -17.670597047 + 12.5 x = -17.670597047 + 12.5 Combine like terms: -17.670597047 + 12.5 = -5.170597047 x = -5.170597047 Simplifying x = -5.170597047

Solution

The solution to the problem is based on the solutions from the subproblems. x = {30.170597047, -5.170597047}

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