4x^2-9x+6+12x^2+5x-13=

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Solution for 4x^2-9x+6+12x^2+5x-13= equation:


Simplifying
4x2 + -9x + 6 + 12x2 + 5x + -13 = 0

Reorder the terms:
6 + -13 + -9x + 5x + 4x2 + 12x2 = 0

Combine like terms: 6 + -13 = -7
-7 + -9x + 5x + 4x2 + 12x2 = 0

Combine like terms: -9x + 5x = -4x
-7 + -4x + 4x2 + 12x2 = 0

Combine like terms: 4x2 + 12x2 = 16x2
-7 + -4x + 16x2 = 0

Solving
-7 + -4x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
-0.4375 + -0.25x + x2 = 0

Move the constant term to the right:

Add '0.4375' to each side of the equation.
-0.4375 + -0.25x + 0.4375 + x2 = 0 + 0.4375

Reorder the terms:
-0.4375 + 0.4375 + -0.25x + x2 = 0 + 0.4375

Combine like terms: -0.4375 + 0.4375 = 0.0000
0.0000 + -0.25x + x2 = 0 + 0.4375
-0.25x + x2 = 0 + 0.4375

Combine like terms: 0 + 0.4375 = 0.4375
-0.25x + x2 = 0.4375

The x term is -0.25x.  Take half its coefficient (-0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
-0.25x + 0.015625 + x2 = 0.4375 + 0.015625

Reorder the terms:
0.015625 + -0.25x + x2 = 0.4375 + 0.015625

Combine like terms: 0.4375 + 0.015625 = 0.453125
0.015625 + -0.25x + x2 = 0.453125

Factor a perfect square on the left side:
(x + -0.125)(x + -0.125) = 0.453125

Calculate the square root of the right side: 0.673145601

Break this problem into two subproblems by setting 
(x + -0.125) equal to 0.673145601 and -0.673145601.

Subproblem 1

x + -0.125 = 0.673145601 Simplifying x + -0.125 = 0.673145601 Reorder the terms: -0.125 + x = 0.673145601 Solving -0.125 + x = 0.673145601 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + x = 0.673145601 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + x = 0.673145601 + 0.125 x = 0.673145601 + 0.125 Combine like terms: 0.673145601 + 0.125 = 0.798145601 x = 0.798145601 Simplifying x = 0.798145601

Subproblem 2

x + -0.125 = -0.673145601 Simplifying x + -0.125 = -0.673145601 Reorder the terms: -0.125 + x = -0.673145601 Solving -0.125 + x = -0.673145601 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + x = -0.673145601 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + x = -0.673145601 + 0.125 x = -0.673145601 + 0.125 Combine like terms: -0.673145601 + 0.125 = -0.548145601 x = -0.548145601 Simplifying x = -0.548145601

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.798145601, -0.548145601}

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