(-12x^2+4x)-(5x^2+7x-3)=

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Solution for (-12x^2+4x)-(5x^2+7x-3)= equation:


Simplifying
(-12x2 + 4x) + -1(5x2 + 7x + -3) = 0

Reorder the terms:
(4x + -12x2) + -1(5x2 + 7x + -3) = 0

Remove parenthesis around (4x + -12x2)
4x + -12x2 + -1(5x2 + 7x + -3) = 0

Reorder the terms:
4x + -12x2 + -1(-3 + 7x + 5x2) = 0
4x + -12x2 + (-3 * -1 + 7x * -1 + 5x2 * -1) = 0
4x + -12x2 + (3 + -7x + -5x2) = 0

Reorder the terms:
3 + 4x + -7x + -12x2 + -5x2 = 0

Combine like terms: 4x + -7x = -3x
3 + -3x + -12x2 + -5x2 = 0

Combine like terms: -12x2 + -5x2 = -17x2
3 + -3x + -17x2 = 0

Solving
3 + -3x + -17x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-17 the coefficient of the squared term: 

Divide each side by '-17'.
-0.1764705882 + 0.1764705882x + x2 = 0

Move the constant term to the right:

Add '0.1764705882' to each side of the equation.
-0.1764705882 + 0.1764705882x + 0.1764705882 + x2 = 0 + 0.1764705882

Reorder the terms:
-0.1764705882 + 0.1764705882 + 0.1764705882x + x2 = 0 + 0.1764705882

Combine like terms: -0.1764705882 + 0.1764705882 = 0.0000000000
0.0000000000 + 0.1764705882x + x2 = 0 + 0.1764705882
0.1764705882x + x2 = 0 + 0.1764705882

Combine like terms: 0 + 0.1764705882 = 0.1764705882
0.1764705882x + x2 = 0.1764705882

The x term is 0.1764705882x.  Take half its coefficient (0.0882352941).
Square it (0.007785467125) and add it to both sides.

Add '0.007785467125' to each side of the equation.
0.1764705882x + 0.007785467125 + x2 = 0.1764705882 + 0.007785467125

Reorder the terms:
0.007785467125 + 0.1764705882x + x2 = 0.1764705882 + 0.007785467125

Combine like terms: 0.1764705882 + 0.007785467125 = 0.184256055325
0.007785467125 + 0.1764705882x + x2 = 0.184256055325

Factor a perfect square on the left side:
(x + 0.0882352941)(x + 0.0882352941) = 0.184256055325

Calculate the square root of the right side: 0.429250574

Break this problem into two subproblems by setting 
(x + 0.0882352941) equal to 0.429250574 and -0.429250574.

Subproblem 1

x + 0.0882352941 = 0.429250574 Simplifying x + 0.0882352941 = 0.429250574 Reorder the terms: 0.0882352941 + x = 0.429250574 Solving 0.0882352941 + x = 0.429250574 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0882352941' to each side of the equation. 0.0882352941 + -0.0882352941 + x = 0.429250574 + -0.0882352941 Combine like terms: 0.0882352941 + -0.0882352941 = 0.0000000000 0.0000000000 + x = 0.429250574 + -0.0882352941 x = 0.429250574 + -0.0882352941 Combine like terms: 0.429250574 + -0.0882352941 = 0.3410152799 x = 0.3410152799 Simplifying x = 0.3410152799

Subproblem 2

x + 0.0882352941 = -0.429250574 Simplifying x + 0.0882352941 = -0.429250574 Reorder the terms: 0.0882352941 + x = -0.429250574 Solving 0.0882352941 + x = -0.429250574 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0882352941' to each side of the equation. 0.0882352941 + -0.0882352941 + x = -0.429250574 + -0.0882352941 Combine like terms: 0.0882352941 + -0.0882352941 = 0.0000000000 0.0000000000 + x = -0.429250574 + -0.0882352941 x = -0.429250574 + -0.0882352941 Combine like terms: -0.429250574 + -0.0882352941 = -0.5174858681 x = -0.5174858681 Simplifying x = -0.5174858681

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.3410152799, -0.5174858681}

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