3x-2x^2=28

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Solution for 3x-2x^2=28 equation:


Simplifying
3x + -2x2 = 28

Solving
3x + -2x2 = 28

Solving for variable 'x'.

Reorder the terms:
-28 + 3x + -2x2 = 28 + -28

Combine like terms: 28 + -28 = 0
-28 + 3x + -2x2 = 0

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

Divide each side by '-2'.
14 + -1.5x + x2 = 0

Move the constant term to the right:

Add '-14' to each side of the equation.
14 + -1.5x + -14 + x2 = 0 + -14

Reorder the terms:
14 + -14 + -1.5x + x2 = 0 + -14

Combine like terms: 14 + -14 = 0
0 + -1.5x + x2 = 0 + -14
-1.5x + x2 = 0 + -14

Combine like terms: 0 + -14 = -14
-1.5x + x2 = -14

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 = -14 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = -14 + 0.5625

Combine like terms: -14 + 0.5625 = -13.4375
0.5625 + -1.5x + x2 = -13.4375

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = -13.4375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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