80=(2x+8)(2x+11)-88

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Solution for 80=(2x+8)(2x+11)-88 equation:


Simplifying
80 = (2x + 8)(2x + 11) + -88

Reorder the terms:
80 = (8 + 2x)(2x + 11) + -88

Reorder the terms:
80 = (8 + 2x)(11 + 2x) + -88

Multiply (8 + 2x) * (11 + 2x)
80 = (8(11 + 2x) + 2x * (11 + 2x)) + -88
80 = ((11 * 8 + 2x * 8) + 2x * (11 + 2x)) + -88
80 = ((88 + 16x) + 2x * (11 + 2x)) + -88
80 = (88 + 16x + (11 * 2x + 2x * 2x)) + -88
80 = (88 + 16x + (22x + 4x2)) + -88

Combine like terms: 16x + 22x = 38x
80 = (88 + 38x + 4x2) + -88

Reorder the terms:
80 = 88 + -88 + 38x + 4x2

Combine like terms: 88 + -88 = 0
80 = 0 + 38x + 4x2
80 = 38x + 4x2

Solving
80 = 38x + 4x2

Solving for variable 'x'.

Reorder the terms:
80 + -38x + -4x2 = 38x + -38x + 4x2 + -4x2

Combine like terms: 38x + -38x = 0
80 + -38x + -4x2 = 0 + 4x2 + -4x2
80 + -38x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
80 + -38x + -4x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(40 + -19x + -2x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(40 + -19x + -2x2)' equal to zero and attempt to solve: Simplifying 40 + -19x + -2x2 = 0 Solving 40 + -19x + -2x2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. -20 + 9.5x + x2 = 0 Move the constant term to the right: Add '20' to each side of the equation. -20 + 9.5x + 20 + x2 = 0 + 20 Reorder the terms: -20 + 20 + 9.5x + x2 = 0 + 20 Combine like terms: -20 + 20 = 0 0 + 9.5x + x2 = 0 + 20 9.5x + x2 = 0 + 20 Combine like terms: 0 + 20 = 20 9.5x + x2 = 20 The x term is 9.5x. Take half its coefficient (4.75). Square it (22.5625) and add it to both sides. Add '22.5625' to each side of the equation. 9.5x + 22.5625 + x2 = 20 + 22.5625 Reorder the terms: 22.5625 + 9.5x + x2 = 20 + 22.5625 Combine like terms: 20 + 22.5625 = 42.5625 22.5625 + 9.5x + x2 = 42.5625 Factor a perfect square on the left side: (x + 4.75)(x + 4.75) = 42.5625 Calculate the square root of the right side: 6.523994175 Break this problem into two subproblems by setting (x + 4.75) equal to 6.523994175 and -6.523994175.

Subproblem 1

x + 4.75 = 6.523994175 Simplifying x + 4.75 = 6.523994175 Reorder the terms: 4.75 + x = 6.523994175 Solving 4.75 + x = 6.523994175 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = 6.523994175 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = 6.523994175 + -4.75 x = 6.523994175 + -4.75 Combine like terms: 6.523994175 + -4.75 = 1.773994175 x = 1.773994175 Simplifying x = 1.773994175

Subproblem 2

x + 4.75 = -6.523994175 Simplifying x + 4.75 = -6.523994175 Reorder the terms: 4.75 + x = -6.523994175 Solving 4.75 + x = -6.523994175 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = -6.523994175 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = -6.523994175 + -4.75 x = -6.523994175 + -4.75 Combine like terms: -6.523994175 + -4.75 = -11.273994175 x = -11.273994175 Simplifying x = -11.273994175

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.773994175, -11.273994175}

Solution

x = {1.773994175, -11.273994175}

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