4x^2-32x=69

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Solution for 4x^2-32x=69 equation:


Simplifying
4x2 + -32x = 69

Reorder the terms:
-32x + 4x2 = 69

Solving
-32x + 4x2 = 69

Solving for variable 'x'.

Reorder the terms:
-69 + -32x + 4x2 = 69 + -69

Combine like terms: 69 + -69 = 0
-69 + -32x + 4x2 = 0

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

Divide each side by '4'.
-17.25 + -8x + x2 = 0

Move the constant term to the right:

Add '17.25' to each side of the equation.
-17.25 + -8x + 17.25 + x2 = 0 + 17.25

Reorder the terms:
-17.25 + 17.25 + -8x + x2 = 0 + 17.25

Combine like terms: -17.25 + 17.25 = 0.00
0.00 + -8x + x2 = 0 + 17.25
-8x + x2 = 0 + 17.25

Combine like terms: 0 + 17.25 = 17.25
-8x + x2 = 17.25

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 = 17.25 + 16

Reorder the terms:
16 + -8x + x2 = 17.25 + 16

Combine like terms: 17.25 + 16 = 33.25
16 + -8x + x2 = 33.25

Factor a perfect square on the left side:
(x + -4)(x + -4) = 33.25

Calculate the square root of the right side: 5.766281297

Break this problem into two subproblems by setting 
(x + -4) equal to 5.766281297 and -5.766281297.

Subproblem 1

x + -4 = 5.766281297 Simplifying x + -4 = 5.766281297 Reorder the terms: -4 + x = 5.766281297 Solving -4 + x = 5.766281297 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 = 5.766281297 + 4 Combine like terms: -4 + 4 = 0 0 + x = 5.766281297 + 4 x = 5.766281297 + 4 Combine like terms: 5.766281297 + 4 = 9.766281297 x = 9.766281297 Simplifying x = 9.766281297

Subproblem 2

x + -4 = -5.766281297 Simplifying x + -4 = -5.766281297 Reorder the terms: -4 + x = -5.766281297 Solving -4 + x = -5.766281297 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 = -5.766281297 + 4 Combine like terms: -4 + 4 = 0 0 + x = -5.766281297 + 4 x = -5.766281297 + 4 Combine like terms: -5.766281297 + 4 = -1.766281297 x = -1.766281297 Simplifying x = -1.766281297

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.766281297, -1.766281297}

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