2x-5x^2-5=12

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Solution for 2x-5x^2-5=12 equation:


Simplifying
2x + -5x2 + -5 = 12

Reorder the terms:
-5 + 2x + -5x2 = 12

Solving
-5 + 2x + -5x2 = 12

Solving for variable 'x'.

Reorder the terms:
-5 + -12 + 2x + -5x2 = 12 + -12

Combine like terms: -5 + -12 = -17
-17 + 2x + -5x2 = 12 + -12

Combine like terms: 12 + -12 = 0
-17 + 2x + -5x2 = 0

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

Divide each side by '-5'.
3.4 + -0.4x + x2 = 0

Move the constant term to the right:

Add '-3.4' to each side of the equation.
3.4 + -0.4x + -3.4 + x2 = 0 + -3.4

Reorder the terms:
3.4 + -3.4 + -0.4x + x2 = 0 + -3.4

Combine like terms: 3.4 + -3.4 = 0.0
0.0 + -0.4x + x2 = 0 + -3.4
-0.4x + x2 = 0 + -3.4

Combine like terms: 0 + -3.4 = -3.4
-0.4x + x2 = -3.4

The x term is -0.4x.  Take half its coefficient (-0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
-0.4x + 0.04 + x2 = -3.4 + 0.04

Reorder the terms:
0.04 + -0.4x + x2 = -3.4 + 0.04

Combine like terms: -3.4 + 0.04 = -3.36
0.04 + -0.4x + x2 = -3.36

Factor a perfect square on the left side:
(x + -0.2)(x + -0.2) = -3.36

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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