-4x^2+8x=11

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Solution for -4x^2+8x=11 equation:


Simplifying
-4x2 + 8x = 11

Reorder the terms:
8x + -4x2 = 11

Solving
8x + -4x2 = 11

Solving for variable 'x'.

Reorder the terms:
-11 + 8x + -4x2 = 11 + -11

Combine like terms: 11 + -11 = 0
-11 + 8x + -4x2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
2.75 + -2x + x2 = 0

Move the constant term to the right:

Add '-2.75' to each side of the equation.
2.75 + -2x + -2.75 + x2 = 0 + -2.75

Reorder the terms:
2.75 + -2.75 + -2x + x2 = 0 + -2.75

Combine like terms: 2.75 + -2.75 = 0.00
0.00 + -2x + x2 = 0 + -2.75
-2x + x2 = 0 + -2.75

Combine like terms: 0 + -2.75 = -2.75
-2x + x2 = -2.75

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 = -2.75 + 1

Reorder the terms:
1 + -2x + x2 = -2.75 + 1

Combine like terms: -2.75 + 1 = -1.75
1 + -2x + x2 = -1.75

Factor a perfect square on the left side:
(x + -1)(x + -1) = -1.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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