-3x^2-12x=-10

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Solution for -3x^2-12x=-10 equation:


Simplifying
-3x2 + -12x = -10

Reorder the terms:
-12x + -3x2 = -10

Solving
-12x + -3x2 = -10

Solving for variable 'x'.

Reorder the terms:
10 + -12x + -3x2 = -10 + 10

Combine like terms: -10 + 10 = 0
10 + -12x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-3.333333333 + 4x + x2 = 0

Move the constant term to the right:

Add '3.333333333' to each side of the equation.
-3.333333333 + 4x + 3.333333333 + x2 = 0 + 3.333333333

Reorder the terms:
-3.333333333 + 3.333333333 + 4x + x2 = 0 + 3.333333333

Combine like terms: -3.333333333 + 3.333333333 = 0.000000000
0.000000000 + 4x + x2 = 0 + 3.333333333
4x + x2 = 0 + 3.333333333

Combine like terms: 0 + 3.333333333 = 3.333333333
4x + x2 = 3.333333333

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 3.333333333 + 4

Reorder the terms:
4 + 4x + x2 = 3.333333333 + 4

Combine like terms: 3.333333333 + 4 = 7.333333333
4 + 4x + x2 = 7.333333333

Factor a perfect square on the left side:
(x + 2)(x + 2) = 7.333333333

Calculate the square root of the right side: 2.708012801

Break this problem into two subproblems by setting 
(x + 2) equal to 2.708012801 and -2.708012801.

Subproblem 1

x + 2 = 2.708012801 Simplifying x + 2 = 2.708012801 Reorder the terms: 2 + x = 2.708012801 Solving 2 + x = 2.708012801 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 2.708012801 + -2 Combine like terms: 2 + -2 = 0 0 + x = 2.708012801 + -2 x = 2.708012801 + -2 Combine like terms: 2.708012801 + -2 = 0.708012801 x = 0.708012801 Simplifying x = 0.708012801

Subproblem 2

x + 2 = -2.708012801 Simplifying x + 2 = -2.708012801 Reorder the terms: 2 + x = -2.708012801 Solving 2 + x = -2.708012801 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -2.708012801 + -2 Combine like terms: 2 + -2 = 0 0 + x = -2.708012801 + -2 x = -2.708012801 + -2 Combine like terms: -2.708012801 + -2 = -4.708012801 x = -4.708012801 Simplifying x = -4.708012801

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.708012801, -4.708012801}

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