=-3x(x-6)-2(-7x-5)

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Solution for =-3x(x-6)-2(-7x-5) equation:


Simplifying
0 = -3x(x + -6) + -2(-7x + -5)

Reorder the terms:
0 = -3x(-6 + x) + -2(-7x + -5)
0 = (-6 * -3x + x * -3x) + -2(-7x + -5)
0 = (18x + -3x2) + -2(-7x + -5)

Reorder the terms:
0 = 18x + -3x2 + -2(-5 + -7x)
0 = 18x + -3x2 + (-5 * -2 + -7x * -2)
0 = 18x + -3x2 + (10 + 14x)

Reorder the terms:
0 = 10 + 18x + 14x + -3x2

Combine like terms: 18x + 14x = 32x
0 = 10 + 32x + -3x2

Solving
0 = 10 + 32x + -3x2

Solving for variable 'x'.

Combine like terms: 0 + -10 = -10
-10 + -32x + 3x2 = 10 + 32x + -3x2 + -10 + -32x + 3x2

Reorder the terms:
-10 + -32x + 3x2 = 10 + -10 + 32x + -32x + -3x2 + 3x2

Combine like terms: 10 + -10 = 0
-10 + -32x + 3x2 = 0 + 32x + -32x + -3x2 + 3x2
-10 + -32x + 3x2 = 32x + -32x + -3x2 + 3x2

Combine like terms: 32x + -32x = 0
-10 + -32x + 3x2 = 0 + -3x2 + 3x2
-10 + -32x + 3x2 = -3x2 + 3x2

Combine like terms: -3x2 + 3x2 = 0
-10 + -32x + 3x2 = 0

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

Divide each side by '3'.
-3.333333333 + -10.66666667x + x2 = 0

Move the constant term to the right:

Add '3.333333333' to each side of the equation.
-3.333333333 + -10.66666667x + 3.333333333 + x2 = 0 + 3.333333333

Reorder the terms:
-3.333333333 + 3.333333333 + -10.66666667x + x2 = 0 + 3.333333333

Combine like terms: -3.333333333 + 3.333333333 = 0.000000000
0.000000000 + -10.66666667x + x2 = 0 + 3.333333333
-10.66666667x + x2 = 0 + 3.333333333

Combine like terms: 0 + 3.333333333 = 3.333333333
-10.66666667x + x2 = 3.333333333

The x term is -10.66666667x.  Take half its coefficient (-5.333333335).
Square it (28.44444446) and add it to both sides.

Add '28.44444446' to each side of the equation.
-10.66666667x + 28.44444446 + x2 = 3.333333333 + 28.44444446

Reorder the terms:
28.44444446 + -10.66666667x + x2 = 3.333333333 + 28.44444446

Combine like terms: 3.333333333 + 28.44444446 = 31.777777793
28.44444446 + -10.66666667x + x2 = 31.777777793

Factor a perfect square on the left side:
(x + -5.333333335)(x + -5.333333335) = 31.777777793

Calculate the square root of the right side: 5.637178176

Break this problem into two subproblems by setting 
(x + -5.333333335) equal to 5.637178176 and -5.637178176.

Subproblem 1

x + -5.333333335 = 5.637178176 Simplifying x + -5.333333335 = 5.637178176 Reorder the terms: -5.333333335 + x = 5.637178176 Solving -5.333333335 + x = 5.637178176 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.333333335' to each side of the equation. -5.333333335 + 5.333333335 + x = 5.637178176 + 5.333333335 Combine like terms: -5.333333335 + 5.333333335 = 0.000000000 0.000000000 + x = 5.637178176 + 5.333333335 x = 5.637178176 + 5.333333335 Combine like terms: 5.637178176 + 5.333333335 = 10.970511511 x = 10.970511511 Simplifying x = 10.970511511

Subproblem 2

x + -5.333333335 = -5.637178176 Simplifying x + -5.333333335 = -5.637178176 Reorder the terms: -5.333333335 + x = -5.637178176 Solving -5.333333335 + x = -5.637178176 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.333333335' to each side of the equation. -5.333333335 + 5.333333335 + x = -5.637178176 + 5.333333335 Combine like terms: -5.333333335 + 5.333333335 = 0.000000000 0.000000000 + x = -5.637178176 + 5.333333335 x = -5.637178176 + 5.333333335 Combine like terms: -5.637178176 + 5.333333335 = -0.303844841 x = -0.303844841 Simplifying x = -0.303844841

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.970511511, -0.303844841}

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