3x^2-40=-6x^2-5x-24

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Solution for 3x^2-40=-6x^2-5x-24 equation:


Simplifying
3x2 + -40 = -6x2 + -5x + -24

Reorder the terms:
-40 + 3x2 = -6x2 + -5x + -24

Reorder the terms:
-40 + 3x2 = -24 + -5x + -6x2

Solving
-40 + 3x2 = -24 + -5x + -6x2

Solving for variable 'x'.

Reorder the terms:
-40 + 24 + 5x + 3x2 + 6x2 = -24 + -5x + -6x2 + 24 + 5x + 6x2

Combine like terms: -40 + 24 = -16
-16 + 5x + 3x2 + 6x2 = -24 + -5x + -6x2 + 24 + 5x + 6x2

Combine like terms: 3x2 + 6x2 = 9x2
-16 + 5x + 9x2 = -24 + -5x + -6x2 + 24 + 5x + 6x2

Reorder the terms:
-16 + 5x + 9x2 = -24 + 24 + -5x + 5x + -6x2 + 6x2

Combine like terms: -24 + 24 = 0
-16 + 5x + 9x2 = 0 + -5x + 5x + -6x2 + 6x2
-16 + 5x + 9x2 = -5x + 5x + -6x2 + 6x2

Combine like terms: -5x + 5x = 0
-16 + 5x + 9x2 = 0 + -6x2 + 6x2
-16 + 5x + 9x2 = -6x2 + 6x2

Combine like terms: -6x2 + 6x2 = 0
-16 + 5x + 9x2 = 0

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

Divide each side by '9'.
-1.777777778 + 0.5555555556x + x2 = 0

Move the constant term to the right:

Add '1.777777778' to each side of the equation.
-1.777777778 + 0.5555555556x + 1.777777778 + x2 = 0 + 1.777777778

Reorder the terms:
-1.777777778 + 1.777777778 + 0.5555555556x + x2 = 0 + 1.777777778

Combine like terms: -1.777777778 + 1.777777778 = 0.000000000
0.000000000 + 0.5555555556x + x2 = 0 + 1.777777778
0.5555555556x + x2 = 0 + 1.777777778

Combine like terms: 0 + 1.777777778 = 1.777777778
0.5555555556x + x2 = 1.777777778

The x term is 0.5555555556x.  Take half its coefficient (0.2777777778).
Square it (0.07716049384) and add it to both sides.

Add '0.07716049384' to each side of the equation.
0.5555555556x + 0.07716049384 + x2 = 1.777777778 + 0.07716049384

Reorder the terms:
0.07716049384 + 0.5555555556x + x2 = 1.777777778 + 0.07716049384

Combine like terms: 1.777777778 + 0.07716049384 = 1.85493827184
0.07716049384 + 0.5555555556x + x2 = 1.85493827184

Factor a perfect square on the left side:
(x + 0.2777777778)(x + 0.2777777778) = 1.85493827184

Calculate the square root of the right side: 1.361961186

Break this problem into two subproblems by setting 
(x + 0.2777777778) equal to 1.361961186 and -1.361961186.

Subproblem 1

x + 0.2777777778 = 1.361961186 Simplifying x + 0.2777777778 = 1.361961186 Reorder the terms: 0.2777777778 + x = 1.361961186 Solving 0.2777777778 + x = 1.361961186 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2777777778' to each side of the equation. 0.2777777778 + -0.2777777778 + x = 1.361961186 + -0.2777777778 Combine like terms: 0.2777777778 + -0.2777777778 = 0.0000000000 0.0000000000 + x = 1.361961186 + -0.2777777778 x = 1.361961186 + -0.2777777778 Combine like terms: 1.361961186 + -0.2777777778 = 1.0841834082 x = 1.0841834082 Simplifying x = 1.0841834082

Subproblem 2

x + 0.2777777778 = -1.361961186 Simplifying x + 0.2777777778 = -1.361961186 Reorder the terms: 0.2777777778 + x = -1.361961186 Solving 0.2777777778 + x = -1.361961186 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2777777778' to each side of the equation. 0.2777777778 + -0.2777777778 + x = -1.361961186 + -0.2777777778 Combine like terms: 0.2777777778 + -0.2777777778 = 0.0000000000 0.0000000000 + x = -1.361961186 + -0.2777777778 x = -1.361961186 + -0.2777777778 Combine like terms: -1.361961186 + -0.2777777778 = -1.6397389638 x = -1.6397389638 Simplifying x = -1.6397389638

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.0841834082, -1.6397389638}

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