13x^2-(3x^2+2x)-(-6)=

Solution for 13x^2-(3x^2+2x)-(-6)= equation:

Simplifying
13x2 + -1(3x2 + 2x) + -1(-6) = 0

Reorder the terms:
13x2 + -1(2x + 3x2) + -1(-6) = 0
13x2 + (2x * -1 + 3x2 * -1) + -1(-6) = 0
13x2 + (-2x + -3x2) + -1(-6) = 0

Multiply -1 * -6
13x2 + -2x + -3x2 + 6 = 0

Reorder the terms:
6 + -2x + 13x2 + -3x2 = 0

Combine like terms: 13x2 + -3x2 = 10x2
6 + -2x + 10x2 = 0

Solving
6 + -2x + 10x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(3 + -1x + 5x2) = 0

Ignore the factor 2.
Subproblem 1
Set the factor '(3 + -1x + 5x2)' equal to zero and attempt to solve:

Simplifying
3 + -1x + 5x2 = 0

Solving
3 + -1x + 5x2 = 0

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

Divide each side by '5'.
0.6 + -0.2x + x2 = 0

Move the constant term to the right:

Add '-0.6' to each side of the equation.
0.6 + -0.2x + -0.6 + x2 = 0 + -0.6

Reorder the terms:
0.6 + -0.6 + -0.2x + x2 = 0 + -0.6

Combine like terms: 0.6 + -0.6 = 0.0
0.0 + -0.2x + x2 = 0 + -0.6
-0.2x + x2 = 0 + -0.6

Combine like terms: 0 + -0.6 = -0.6
-0.2x + x2 = -0.6

The x term is -0.2x.  Take half its coefficient (-0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
-0.2x + 0.01 + x2 = -0.6 + 0.01

Reorder the terms:
0.01 + -0.2x + x2 = -0.6 + 0.01

Combine like terms: -0.6 + 0.01 = -0.59
0.01 + -0.2x + x2 = -0.59

Factor a perfect square on the left side:
(x + -0.1)(x + -0.1) = -0.59

Can't calculate square root of the right side.

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.

The solution to this equation could not be determined.