(-3x+1)(-x+4)+5x^2-6=0

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Solution for (-3x+1)(-x+4)+5x^2-6=0 equation:


Simplifying
(-3x + 1)(-1x + 4) + 5x2 + -6 = 0

Reorder the terms:
(1 + -3x)(-1x + 4) + 5x2 + -6 = 0

Reorder the terms:
(1 + -3x)(4 + -1x) + 5x2 + -6 = 0

Multiply (1 + -3x) * (4 + -1x)
(1(4 + -1x) + -3x * (4 + -1x)) + 5x2 + -6 = 0
((4 * 1 + -1x * 1) + -3x * (4 + -1x)) + 5x2 + -6 = 0
((4 + -1x) + -3x * (4 + -1x)) + 5x2 + -6 = 0
(4 + -1x + (4 * -3x + -1x * -3x)) + 5x2 + -6 = 0
(4 + -1x + (-12x + 3x2)) + 5x2 + -6 = 0

Combine like terms: -1x + -12x = -13x
(4 + -13x + 3x2) + 5x2 + -6 = 0

Reorder the terms:
4 + -6 + -13x + 3x2 + 5x2 = 0

Combine like terms: 4 + -6 = -2
-2 + -13x + 3x2 + 5x2 = 0

Combine like terms: 3x2 + 5x2 = 8x2
-2 + -13x + 8x2 = 0

Solving
-2 + -13x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
-0.25 + -1.625x + x2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + -1.625x + 0.25 + x2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + -1.625x + x2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + -1.625x + x2 = 0 + 0.25
-1.625x + x2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
-1.625x + x2 = 0.25

The x term is -1.625x.  Take half its coefficient (-0.8125).
Square it (0.66015625) and add it to both sides.

Add '0.66015625' to each side of the equation.
-1.625x + 0.66015625 + x2 = 0.25 + 0.66015625

Reorder the terms:
0.66015625 + -1.625x + x2 = 0.25 + 0.66015625

Combine like terms: 0.25 + 0.66015625 = 0.91015625
0.66015625 + -1.625x + x2 = 0.91015625

Factor a perfect square on the left side:
(x + -0.8125)(x + -0.8125) = 0.91015625

Calculate the square root of the right side: 0.954021095

Break this problem into two subproblems by setting 
(x + -0.8125) equal to 0.954021095 and -0.954021095.

Subproblem 1

x + -0.8125 = 0.954021095 Simplifying x + -0.8125 = 0.954021095 Reorder the terms: -0.8125 + x = 0.954021095 Solving -0.8125 + x = 0.954021095 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8125' to each side of the equation. -0.8125 + 0.8125 + x = 0.954021095 + 0.8125 Combine like terms: -0.8125 + 0.8125 = 0.0000 0.0000 + x = 0.954021095 + 0.8125 x = 0.954021095 + 0.8125 Combine like terms: 0.954021095 + 0.8125 = 1.766521095 x = 1.766521095 Simplifying x = 1.766521095

Subproblem 2

x + -0.8125 = -0.954021095 Simplifying x + -0.8125 = -0.954021095 Reorder the terms: -0.8125 + x = -0.954021095 Solving -0.8125 + x = -0.954021095 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8125' to each side of the equation. -0.8125 + 0.8125 + x = -0.954021095 + 0.8125 Combine like terms: -0.8125 + 0.8125 = 0.0000 0.0000 + x = -0.954021095 + 0.8125 x = -0.954021095 + 0.8125 Combine like terms: -0.954021095 + 0.8125 = -0.141521095 x = -0.141521095 Simplifying x = -0.141521095

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.766521095, -0.141521095}

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