(x-2)(x+2)=11x-7

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Solution for (x-2)(x+2)=11x-7 equation:


Simplifying
(x + -2)(x + 2) = 11x + -7

Reorder the terms:
(-2 + x)(x + 2) = 11x + -7

Reorder the terms:
(-2 + x)(2 + x) = 11x + -7

Multiply (-2 + x) * (2 + x)
(-2(2 + x) + x(2 + x)) = 11x + -7
((2 * -2 + x * -2) + x(2 + x)) = 11x + -7
((-4 + -2x) + x(2 + x)) = 11x + -7
(-4 + -2x + (2 * x + x * x)) = 11x + -7
(-4 + -2x + (2x + x2)) = 11x + -7

Combine like terms: -2x + 2x = 0
(-4 + 0 + x2) = 11x + -7
(-4 + x2) = 11x + -7

Reorder the terms:
-4 + x2 = -7 + 11x

Solving
-4 + x2 = -7 + 11x

Solving for variable 'x'.

Reorder the terms:
-4 + 7 + -11x + x2 = -7 + 11x + 7 + -11x

Combine like terms: -4 + 7 = 3
3 + -11x + x2 = -7 + 11x + 7 + -11x

Reorder the terms:
3 + -11x + x2 = -7 + 7 + 11x + -11x

Combine like terms: -7 + 7 = 0
3 + -11x + x2 = 0 + 11x + -11x
3 + -11x + x2 = 11x + -11x

Combine like terms: 11x + -11x = 0
3 + -11x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -11x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + -11x + x2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -11x + x2 = 0 + -3
-11x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
-11x + x2 = -3

The x term is -11x.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11x + 30.25 + x2 = -3 + 30.25

Reorder the terms:
30.25 + -11x + x2 = -3 + 30.25

Combine like terms: -3 + 30.25 = 27.25
30.25 + -11x + x2 = 27.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 27.25

Calculate the square root of the right side: 5.220153254

Break this problem into two subproblems by setting 
(x + -5.5) equal to 5.220153254 and -5.220153254.

Subproblem 1

x + -5.5 = 5.220153254 Simplifying x + -5.5 = 5.220153254 Reorder the terms: -5.5 + x = 5.220153254 Solving -5.5 + x = 5.220153254 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = 5.220153254 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 5.220153254 + 5.5 x = 5.220153254 + 5.5 Combine like terms: 5.220153254 + 5.5 = 10.720153254 x = 10.720153254 Simplifying x = 10.720153254

Subproblem 2

x + -5.5 = -5.220153254 Simplifying x + -5.5 = -5.220153254 Reorder the terms: -5.5 + x = -5.220153254 Solving -5.5 + x = -5.220153254 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = -5.220153254 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -5.220153254 + 5.5 x = -5.220153254 + 5.5 Combine like terms: -5.220153254 + 5.5 = 0.279846746 x = 0.279846746 Simplifying x = 0.279846746

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.720153254, 0.279846746}

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