(x+12)(x-30)+26=0

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Solution for (x+12)(x-30)+26=0 equation:


Simplifying
(x + 12)(x + -30) + 26 = 0

Reorder the terms:
(12 + x)(x + -30) + 26 = 0

Reorder the terms:
(12 + x)(-30 + x) + 26 = 0

Multiply (12 + x) * (-30 + x)
(12(-30 + x) + x(-30 + x)) + 26 = 0
((-30 * 12 + x * 12) + x(-30 + x)) + 26 = 0
((-360 + 12x) + x(-30 + x)) + 26 = 0
(-360 + 12x + (-30 * x + x * x)) + 26 = 0
(-360 + 12x + (-30x + x2)) + 26 = 0

Combine like terms: 12x + -30x = -18x
(-360 + -18x + x2) + 26 = 0

Reorder the terms:
-360 + 26 + -18x + x2 = 0

Combine like terms: -360 + 26 = -334
-334 + -18x + x2 = 0

Solving
-334 + -18x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '334' to each side of the equation.
-334 + -18x + 334 + x2 = 0 + 334

Reorder the terms:
-334 + 334 + -18x + x2 = 0 + 334

Combine like terms: -334 + 334 = 0
0 + -18x + x2 = 0 + 334
-18x + x2 = 0 + 334

Combine like terms: 0 + 334 = 334
-18x + x2 = 334

The x term is -18x.  Take half its coefficient (-9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
-18x + 81 + x2 = 334 + 81

Reorder the terms:
81 + -18x + x2 = 334 + 81

Combine like terms: 334 + 81 = 415
81 + -18x + x2 = 415

Factor a perfect square on the left side:
(x + -9)(x + -9) = 415

Calculate the square root of the right side: 20.371548787

Break this problem into two subproblems by setting 
(x + -9) equal to 20.371548787 and -20.371548787.

Subproblem 1

x + -9 = 20.371548787 Simplifying x + -9 = 20.371548787 Reorder the terms: -9 + x = 20.371548787 Solving -9 + x = 20.371548787 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + x = 20.371548787 + 9 Combine like terms: -9 + 9 = 0 0 + x = 20.371548787 + 9 x = 20.371548787 + 9 Combine like terms: 20.371548787 + 9 = 29.371548787 x = 29.371548787 Simplifying x = 29.371548787

Subproblem 2

x + -9 = -20.371548787 Simplifying x + -9 = -20.371548787 Reorder the terms: -9 + x = -20.371548787 Solving -9 + x = -20.371548787 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + x = -20.371548787 + 9 Combine like terms: -9 + 9 = 0 0 + x = -20.371548787 + 9 x = -20.371548787 + 9 Combine like terms: -20.371548787 + 9 = -11.371548787 x = -11.371548787 Simplifying x = -11.371548787

Solution

The solution to the problem is based on the solutions from the subproblems. x = {29.371548787, -11.371548787}

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