(-4x^2-3x+6)+(-9x^2-1)=

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Solution for (-4x^2-3x+6)+(-9x^2-1)= equation:


Simplifying
(-4x2 + -3x + 6) + (-9x2 + -1) = 0

Reorder the terms:
(6 + -3x + -4x2) + (-9x2 + -1) = 0

Remove parenthesis around (6 + -3x + -4x2)
6 + -3x + -4x2 + (-9x2 + -1) = 0

Reorder the terms:
6 + -3x + -4x2 + (-1 + -9x2) = 0

Remove parenthesis around (-1 + -9x2)
6 + -3x + -4x2 + -1 + -9x2 = 0

Reorder the terms:
6 + -1 + -3x + -4x2 + -9x2 = 0

Combine like terms: 6 + -1 = 5
5 + -3x + -4x2 + -9x2 = 0

Combine like terms: -4x2 + -9x2 = -13x2
5 + -3x + -13x2 = 0

Solving
5 + -3x + -13x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-13 the coefficient of the squared term: 

Divide each side by '-13'.
-0.3846153846 + 0.2307692308x + x2 = 0

Move the constant term to the right:

Add '0.3846153846' to each side of the equation.
-0.3846153846 + 0.2307692308x + 0.3846153846 + x2 = 0 + 0.3846153846

Reorder the terms:
-0.3846153846 + 0.3846153846 + 0.2307692308x + x2 = 0 + 0.3846153846

Combine like terms: -0.3846153846 + 0.3846153846 = 0.0000000000
0.0000000000 + 0.2307692308x + x2 = 0 + 0.3846153846
0.2307692308x + x2 = 0 + 0.3846153846

Combine like terms: 0 + 0.3846153846 = 0.3846153846
0.2307692308x + x2 = 0.3846153846

The x term is 0.2307692308x.  Take half its coefficient (0.1153846154).
Square it (0.01331360947) and add it to both sides.

Add '0.01331360947' to each side of the equation.
0.2307692308x + 0.01331360947 + x2 = 0.3846153846 + 0.01331360947

Reorder the terms:
0.01331360947 + 0.2307692308x + x2 = 0.3846153846 + 0.01331360947

Combine like terms: 0.3846153846 + 0.01331360947 = 0.39792899407
0.01331360947 + 0.2307692308x + x2 = 0.39792899407

Factor a perfect square on the left side:
(x + 0.1153846154)(x + 0.1153846154) = 0.39792899407

Calculate the square root of the right side: 0.630816133

Break this problem into two subproblems by setting 
(x + 0.1153846154) equal to 0.630816133 and -0.630816133.

Subproblem 1

x + 0.1153846154 = 0.630816133 Simplifying x + 0.1153846154 = 0.630816133 Reorder the terms: 0.1153846154 + x = 0.630816133 Solving 0.1153846154 + x = 0.630816133 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1153846154' to each side of the equation. 0.1153846154 + -0.1153846154 + x = 0.630816133 + -0.1153846154 Combine like terms: 0.1153846154 + -0.1153846154 = 0.0000000000 0.0000000000 + x = 0.630816133 + -0.1153846154 x = 0.630816133 + -0.1153846154 Combine like terms: 0.630816133 + -0.1153846154 = 0.5154315176 x = 0.5154315176 Simplifying x = 0.5154315176

Subproblem 2

x + 0.1153846154 = -0.630816133 Simplifying x + 0.1153846154 = -0.630816133 Reorder the terms: 0.1153846154 + x = -0.630816133 Solving 0.1153846154 + x = -0.630816133 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1153846154' to each side of the equation. 0.1153846154 + -0.1153846154 + x = -0.630816133 + -0.1153846154 Combine like terms: 0.1153846154 + -0.1153846154 = 0.0000000000 0.0000000000 + x = -0.630816133 + -0.1153846154 x = -0.630816133 + -0.1153846154 Combine like terms: -0.630816133 + -0.1153846154 = -0.7462007484 x = -0.7462007484 Simplifying x = -0.7462007484

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5154315176, -0.7462007484}

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