(2x+14)(x-3)=90

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Solution for (2x+14)(x-3)=90 equation:


Simplifying
(2x + 14)(x + -3) = 90

Reorder the terms:
(14 + 2x)(x + -3) = 90

Reorder the terms:
(14 + 2x)(-3 + x) = 90

Multiply (14 + 2x) * (-3 + x)
(14(-3 + x) + 2x * (-3 + x)) = 90
((-3 * 14 + x * 14) + 2x * (-3 + x)) = 90
((-42 + 14x) + 2x * (-3 + x)) = 90
(-42 + 14x + (-3 * 2x + x * 2x)) = 90
(-42 + 14x + (-6x + 2x2)) = 90

Combine like terms: 14x + -6x = 8x
(-42 + 8x + 2x2) = 90

Solving
-42 + 8x + 2x2 = 90

Solving for variable 'x'.

Reorder the terms:
-42 + -90 + 8x + 2x2 = 90 + -90

Combine like terms: -42 + -90 = -132
-132 + 8x + 2x2 = 90 + -90

Combine like terms: 90 + -90 = 0
-132 + 8x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-66 + 4x + x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-66 + 4x + x2)' equal to zero and attempt to solve: Simplifying -66 + 4x + x2 = 0 Solving -66 + 4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '66' to each side of the equation. -66 + 4x + 66 + x2 = 0 + 66 Reorder the terms: -66 + 66 + 4x + x2 = 0 + 66 Combine like terms: -66 + 66 = 0 0 + 4x + x2 = 0 + 66 4x + x2 = 0 + 66 Combine like terms: 0 + 66 = 66 4x + x2 = 66 The x term is 4x. Take half its coefficient (2). Square it (4) and add it to both sides. Add '4' to each side of the equation. 4x + 4 + x2 = 66 + 4 Reorder the terms: 4 + 4x + x2 = 66 + 4 Combine like terms: 66 + 4 = 70 4 + 4x + x2 = 70 Factor a perfect square on the left side: (x + 2)(x + 2) = 70 Calculate the square root of the right side: 8.366600265 Break this problem into two subproblems by setting (x + 2) equal to 8.366600265 and -8.366600265.

Subproblem 1

x + 2 = 8.366600265 Simplifying x + 2 = 8.366600265 Reorder the terms: 2 + x = 8.366600265 Solving 2 + x = 8.366600265 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 8.366600265 + -2 Combine like terms: 2 + -2 = 0 0 + x = 8.366600265 + -2 x = 8.366600265 + -2 Combine like terms: 8.366600265 + -2 = 6.366600265 x = 6.366600265 Simplifying x = 6.366600265

Subproblem 2

x + 2 = -8.366600265 Simplifying x + 2 = -8.366600265 Reorder the terms: 2 + x = -8.366600265 Solving 2 + x = -8.366600265 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -8.366600265 + -2 Combine like terms: 2 + -2 = 0 0 + x = -8.366600265 + -2 x = -8.366600265 + -2 Combine like terms: -8.366600265 + -2 = -10.366600265 x = -10.366600265 Simplifying x = -10.366600265

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.366600265, -10.366600265}

Solution

x = {6.366600265, -10.366600265}

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