4x-2x^2=71

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Solution for 4x-2x^2=71 equation:


Simplifying
4x + -2x2 = 71

Solving
4x + -2x2 = 71

Solving for variable 'x'.

Reorder the terms:
-71 + 4x + -2x2 = 71 + -71

Combine like terms: 71 + -71 = 0
-71 + 4x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
35.5 + -2x + x2 = 0

Move the constant term to the right:

Add '-35.5' to each side of the equation.
35.5 + -2x + -35.5 + x2 = 0 + -35.5

Reorder the terms:
35.5 + -35.5 + -2x + x2 = 0 + -35.5

Combine like terms: 35.5 + -35.5 = 0.0
0.0 + -2x + x2 = 0 + -35.5
-2x + x2 = 0 + -35.5

Combine like terms: 0 + -35.5 = -35.5
-2x + x2 = -35.5

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = -35.5 + 1

Reorder the terms:
1 + -2x + x2 = -35.5 + 1

Combine like terms: -35.5 + 1 = -34.5
1 + -2x + x2 = -34.5

Factor a perfect square on the left side:
(x + -1)(x + -1) = -34.5

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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