-3x^2-7+2x+17x^2-12x=

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Solution for -3x^2-7+2x+17x^2-12x= equation:


Simplifying
-3x2 + -7 + 2x + 17x2 + -12x = 0

Reorder the terms:
-7 + 2x + -12x + -3x2 + 17x2 = 0

Combine like terms: 2x + -12x = -10x
-7 + -10x + -3x2 + 17x2 = 0

Combine like terms: -3x2 + 17x2 = 14x2
-7 + -10x + 14x2 = 0

Solving
-7 + -10x + 14x2 = 0

Solving for variable 'x'.

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

Divide each side by '14'.
-0.5 + -0.7142857143x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -0.7142857143x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -0.7142857143x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -0.7142857143x + x2 = 0 + 0.5
-0.7142857143x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-0.7142857143x + x2 = 0.5

The x term is -0.7142857143x.  Take half its coefficient (-0.3571428572).
Square it (0.1275510204) and add it to both sides.

Add '0.1275510204' to each side of the equation.
-0.7142857143x + 0.1275510204 + x2 = 0.5 + 0.1275510204

Reorder the terms:
0.1275510204 + -0.7142857143x + x2 = 0.5 + 0.1275510204

Combine like terms: 0.5 + 0.1275510204 = 0.6275510204
0.1275510204 + -0.7142857143x + x2 = 0.6275510204

Factor a perfect square on the left side:
(x + -0.3571428572)(x + -0.3571428572) = 0.6275510204

Calculate the square root of the right side: 0.792181179

Break this problem into two subproblems by setting 
(x + -0.3571428572) equal to 0.792181179 and -0.792181179.

Subproblem 1

x + -0.3571428572 = 0.792181179 Simplifying x + -0.3571428572 = 0.792181179 Reorder the terms: -0.3571428572 + x = 0.792181179 Solving -0.3571428572 + x = 0.792181179 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + x = 0.792181179 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + x = 0.792181179 + 0.3571428572 x = 0.792181179 + 0.3571428572 Combine like terms: 0.792181179 + 0.3571428572 = 1.1493240362 x = 1.1493240362 Simplifying x = 1.1493240362

Subproblem 2

x + -0.3571428572 = -0.792181179 Simplifying x + -0.3571428572 = -0.792181179 Reorder the terms: -0.3571428572 + x = -0.792181179 Solving -0.3571428572 + x = -0.792181179 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + x = -0.792181179 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + x = -0.792181179 + 0.3571428572 x = -0.792181179 + 0.3571428572 Combine like terms: -0.792181179 + 0.3571428572 = -0.4350383218 x = -0.4350383218 Simplifying x = -0.4350383218

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.1493240362, -0.4350383218}

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