-2=-11X^2+13X

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Solution for -2=-11X^2+13X equation:


Simplifying
-2 = -11X2 + 13X

Reorder the terms:
-2 = 13X + -11X2

Solving
-2 = 13X + -11X2

Solving for variable 'X'.

Reorder the terms:
-2 + -13X + 11X2 = 13X + -13X + -11X2 + 11X2

Combine like terms: 13X + -13X = 0
-2 + -13X + 11X2 = 0 + -11X2 + 11X2
-2 + -13X + 11X2 = -11X2 + 11X2

Combine like terms: -11X2 + 11X2 = 0
-2 + -13X + 11X2 = 0

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

Divide each side by '11'.
-0.1818181818 + -1.181818182X + X2 = 0

Move the constant term to the right:

Add '0.1818181818' to each side of the equation.
-0.1818181818 + -1.181818182X + 0.1818181818 + X2 = 0 + 0.1818181818

Reorder the terms:
-0.1818181818 + 0.1818181818 + -1.181818182X + X2 = 0 + 0.1818181818

Combine like terms: -0.1818181818 + 0.1818181818 = 0.0000000000
0.0000000000 + -1.181818182X + X2 = 0 + 0.1818181818
-1.181818182X + X2 = 0 + 0.1818181818

Combine like terms: 0 + 0.1818181818 = 0.1818181818
-1.181818182X + X2 = 0.1818181818

The X term is -1.181818182X.  Take half its coefficient (-0.590909091).
Square it (0.3491735538) and add it to both sides.

Add '0.3491735538' to each side of the equation.
-1.181818182X + 0.3491735538 + X2 = 0.1818181818 + 0.3491735538

Reorder the terms:
0.3491735538 + -1.181818182X + X2 = 0.1818181818 + 0.3491735538

Combine like terms: 0.1818181818 + 0.3491735538 = 0.5309917356
0.3491735538 + -1.181818182X + X2 = 0.5309917356

Factor a perfect square on the left side:
(X + -0.590909091)(X + -0.590909091) = 0.5309917356

Calculate the square root of the right side: 0.728691797

Break this problem into two subproblems by setting 
(X + -0.590909091) equal to 0.728691797 and -0.728691797.

Subproblem 1

X + -0.590909091 = 0.728691797 Simplifying X + -0.590909091 = 0.728691797 Reorder the terms: -0.590909091 + X = 0.728691797 Solving -0.590909091 + X = 0.728691797 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.590909091' to each side of the equation. -0.590909091 + 0.590909091 + X = 0.728691797 + 0.590909091 Combine like terms: -0.590909091 + 0.590909091 = 0.000000000 0.000000000 + X = 0.728691797 + 0.590909091 X = 0.728691797 + 0.590909091 Combine like terms: 0.728691797 + 0.590909091 = 1.319600888 X = 1.319600888 Simplifying X = 1.319600888

Subproblem 2

X + -0.590909091 = -0.728691797 Simplifying X + -0.590909091 = -0.728691797 Reorder the terms: -0.590909091 + X = -0.728691797 Solving -0.590909091 + X = -0.728691797 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.590909091' to each side of the equation. -0.590909091 + 0.590909091 + X = -0.728691797 + 0.590909091 Combine like terms: -0.590909091 + 0.590909091 = 0.000000000 0.000000000 + X = -0.728691797 + 0.590909091 X = -0.728691797 + 0.590909091 Combine like terms: -0.728691797 + 0.590909091 = -0.137782706 X = -0.137782706 Simplifying X = -0.137782706

Solution

The solution to the problem is based on the solutions from the subproblems. X = {1.319600888, -0.137782706}

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