-12x^2+17x+8=4x^2-x+1

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Solution for -12x^2+17x+8=4x^2-x+1 equation:


Simplifying
-12x2 + 17x + 8 = 4x2 + -1x + 1

Reorder the terms:
8 + 17x + -12x2 = 4x2 + -1x + 1

Reorder the terms:
8 + 17x + -12x2 = 1 + -1x + 4x2

Solving
8 + 17x + -12x2 = 1 + -1x + 4x2

Solving for variable 'x'.

Reorder the terms:
8 + -1 + 17x + x + -12x2 + -4x2 = 1 + -1x + 4x2 + -1 + x + -4x2

Combine like terms: 8 + -1 = 7
7 + 17x + x + -12x2 + -4x2 = 1 + -1x + 4x2 + -1 + x + -4x2

Combine like terms: 17x + x = 18x
7 + 18x + -12x2 + -4x2 = 1 + -1x + 4x2 + -1 + x + -4x2

Combine like terms: -12x2 + -4x2 = -16x2
7 + 18x + -16x2 = 1 + -1x + 4x2 + -1 + x + -4x2

Reorder the terms:
7 + 18x + -16x2 = 1 + -1 + -1x + x + 4x2 + -4x2

Combine like terms: 1 + -1 = 0
7 + 18x + -16x2 = 0 + -1x + x + 4x2 + -4x2
7 + 18x + -16x2 = -1x + x + 4x2 + -4x2

Combine like terms: -1x + x = 0
7 + 18x + -16x2 = 0 + 4x2 + -4x2
7 + 18x + -16x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
7 + 18x + -16x2 = 0

Begin completing the square.  Divide all terms by
-16 the coefficient of the squared term: 

Divide each side by '-16'.
-0.4375 + -1.125x + x2 = 0

Move the constant term to the right:

Add '0.4375' to each side of the equation.
-0.4375 + -1.125x + 0.4375 + x2 = 0 + 0.4375

Reorder the terms:
-0.4375 + 0.4375 + -1.125x + x2 = 0 + 0.4375

Combine like terms: -0.4375 + 0.4375 = 0.0000
0.0000 + -1.125x + x2 = 0 + 0.4375
-1.125x + x2 = 0 + 0.4375

Combine like terms: 0 + 0.4375 = 0.4375
-1.125x + x2 = 0.4375

The x term is -1.125x.  Take half its coefficient (-0.5625).
Square it (0.31640625) and add it to both sides.

Add '0.31640625' to each side of the equation.
-1.125x + 0.31640625 + x2 = 0.4375 + 0.31640625

Reorder the terms:
0.31640625 + -1.125x + x2 = 0.4375 + 0.31640625

Combine like terms: 0.4375 + 0.31640625 = 0.75390625
0.31640625 + -1.125x + x2 = 0.75390625

Factor a perfect square on the left side:
(x + -0.5625)(x + -0.5625) = 0.75390625

Calculate the square root of the right side: 0.868277749

Break this problem into two subproblems by setting 
(x + -0.5625) equal to 0.868277749 and -0.868277749.

Subproblem 1

x + -0.5625 = 0.868277749 Simplifying x + -0.5625 = 0.868277749 Reorder the terms: -0.5625 + x = 0.868277749 Solving -0.5625 + x = 0.868277749 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + x = 0.868277749 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + x = 0.868277749 + 0.5625 x = 0.868277749 + 0.5625 Combine like terms: 0.868277749 + 0.5625 = 1.430777749 x = 1.430777749 Simplifying x = 1.430777749

Subproblem 2

x + -0.5625 = -0.868277749 Simplifying x + -0.5625 = -0.868277749 Reorder the terms: -0.5625 + x = -0.868277749 Solving -0.5625 + x = -0.868277749 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + x = -0.868277749 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + x = -0.868277749 + 0.5625 x = -0.868277749 + 0.5625 Combine like terms: -0.868277749 + 0.5625 = -0.305777749 x = -0.305777749 Simplifying x = -0.305777749

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.430777749, -0.305777749}

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