x(.25x-2)=252

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Solution for x(.25x-2)=252 equation:


Simplifying
x(0.25x + -2) = 252

Reorder the terms:
x(-2 + 0.25x) = 252
(-2 * x + 0.25x * x) = 252
(-2x + 0.25x2) = 252

Solving
-2x + 0.25x2 = 252

Solving for variable 'x'.

Reorder the terms:
-252 + -2x + 0.25x2 = 252 + -252

Combine like terms: 252 + -252 = 0
-252 + -2x + 0.25x2 = 0

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

Divide each side by '0.25'.
-1008 + -8x + x2 = 0

Move the constant term to the right:

Add '1008' to each side of the equation.
-1008 + -8x + 1008 + x2 = 0 + 1008

Reorder the terms:
-1008 + 1008 + -8x + x2 = 0 + 1008

Combine like terms: -1008 + 1008 = 0
0 + -8x + x2 = 0 + 1008
-8x + x2 = 0 + 1008

Combine like terms: 0 + 1008 = 1008
-8x + x2 = 1008

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 1008 + 16

Reorder the terms:
16 + -8x + x2 = 1008 + 16

Combine like terms: 1008 + 16 = 1024
16 + -8x + x2 = 1024

Factor a perfect square on the left side:
(x + -4)(x + -4) = 1024

Calculate the square root of the right side: 32

Break this problem into two subproblems by setting 
(x + -4) equal to 32 and -32.

Subproblem 1

x + -4 = 32 Simplifying x + -4 = 32 Reorder the terms: -4 + x = 32 Solving -4 + x = 32 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 32 + 4 Combine like terms: -4 + 4 = 0 0 + x = 32 + 4 x = 32 + 4 Combine like terms: 32 + 4 = 36 x = 36 Simplifying x = 36

Subproblem 2

x + -4 = -32 Simplifying x + -4 = -32 Reorder the terms: -4 + x = -32 Solving -4 + x = -32 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -32 + 4 Combine like terms: -4 + 4 = 0 0 + x = -32 + 4 x = -32 + 4 Combine like terms: -32 + 4 = -28 x = -28 Simplifying x = -28

Solution

The solution to the problem is based on the solutions from the subproblems. x = {36, -28}

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