6x+2x^2-7x+5=12x^2-30x

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Solution for 6x+2x^2-7x+5=12x^2-30x equation:


Simplifying
6x + 2x2 + -7x + 5 = 12x2 + -30x

Reorder the terms:
5 + 6x + -7x + 2x2 = 12x2 + -30x

Combine like terms: 6x + -7x = -1x
5 + -1x + 2x2 = 12x2 + -30x

Reorder the terms:
5 + -1x + 2x2 = -30x + 12x2

Solving
5 + -1x + 2x2 = -30x + 12x2

Solving for variable 'x'.

Reorder the terms:
5 + -1x + 30x + 2x2 + -12x2 = -30x + 12x2 + 30x + -12x2

Combine like terms: -1x + 30x = 29x
5 + 29x + 2x2 + -12x2 = -30x + 12x2 + 30x + -12x2

Combine like terms: 2x2 + -12x2 = -10x2
5 + 29x + -10x2 = -30x + 12x2 + 30x + -12x2

Reorder the terms:
5 + 29x + -10x2 = -30x + 30x + 12x2 + -12x2

Combine like terms: -30x + 30x = 0
5 + 29x + -10x2 = 0 + 12x2 + -12x2
5 + 29x + -10x2 = 12x2 + -12x2

Combine like terms: 12x2 + -12x2 = 0
5 + 29x + -10x2 = 0

Begin completing the square.  Divide all terms by
-10 the coefficient of the squared term: 

Divide each side by '-10'.
-0.5 + -2.9x + x2 = 0.0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -2.9x + 0.5 + x2 = 0.0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -2.9x + x2 = 0.0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -2.9x + x2 = 0.0 + 0.5
-2.9x + x2 = 0.0 + 0.5

Combine like terms: 0.0 + 0.5 = 0.5
-2.9x + x2 = 0.5

The x term is -2.9x.  Take half its coefficient (-1.45).
Square it (2.1025) and add it to both sides.

Add '2.1025' to each side of the equation.
-2.9x + 2.1025 + x2 = 0.5 + 2.1025

Reorder the terms:
2.1025 + -2.9x + x2 = 0.5 + 2.1025

Combine like terms: 0.5 + 2.1025 = 2.6025
2.1025 + -2.9x + x2 = 2.6025

Factor a perfect square on the left side:
(x + -1.45)(x + -1.45) = 2.6025

Calculate the square root of the right side: 1.61322658

Break this problem into two subproblems by setting 
(x + -1.45) equal to 1.61322658 and -1.61322658.

Subproblem 1

x + -1.45 = 1.61322658 Simplifying x + -1.45 = 1.61322658 Reorder the terms: -1.45 + x = 1.61322658 Solving -1.45 + x = 1.61322658 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.45' to each side of the equation. -1.45 + 1.45 + x = 1.61322658 + 1.45 Combine like terms: -1.45 + 1.45 = 0.00 0.00 + x = 1.61322658 + 1.45 x = 1.61322658 + 1.45 Combine like terms: 1.61322658 + 1.45 = 3.06322658 x = 3.06322658 Simplifying x = 3.06322658

Subproblem 2

x + -1.45 = -1.61322658 Simplifying x + -1.45 = -1.61322658 Reorder the terms: -1.45 + x = -1.61322658 Solving -1.45 + x = -1.61322658 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.45' to each side of the equation. -1.45 + 1.45 + x = -1.61322658 + 1.45 Combine like terms: -1.45 + 1.45 = 0.00 0.00 + x = -1.61322658 + 1.45 x = -1.61322658 + 1.45 Combine like terms: -1.61322658 + 1.45 = -0.16322658 x = -0.16322658 Simplifying x = -0.16322658

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.06322658, -0.16322658}

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