-x(2x-3)=665

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Solution for -x(2x-3)=665 equation:


Simplifying
-1x(2x + -3) = 665

Reorder the terms:
-1x(-3 + 2x) = 665
(-3 * -1x + 2x * -1x) = 665
(3x + -2x2) = 665

Solving
3x + -2x2 = 665

Solving for variable 'x'.

Reorder the terms:
-665 + 3x + -2x2 = 665 + -665

Combine like terms: 665 + -665 = 0
-665 + 3x + -2x2 = 0

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

Divide each side by '-2'.
332.5 + -1.5x + x2 = 0

Move the constant term to the right:

Add '-332.5' to each side of the equation.
332.5 + -1.5x + -332.5 + x2 = 0 + -332.5

Reorder the terms:
332.5 + -332.5 + -1.5x + x2 = 0 + -332.5

Combine like terms: 332.5 + -332.5 = 0.0
0.0 + -1.5x + x2 = 0 + -332.5
-1.5x + x2 = 0 + -332.5

Combine like terms: 0 + -332.5 = -332.5
-1.5x + x2 = -332.5

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = -332.5 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = -332.5 + 0.5625

Combine like terms: -332.5 + 0.5625 = -331.9375
0.5625 + -1.5x + x2 = -331.9375

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = -331.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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