3x=257+2x^2

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Solution for 3x=257+2x^2 equation:


Simplifying
3x = 257 + 2x2

Solving
3x = 257 + 2x2

Solving for variable 'x'.

Reorder the terms:
-257 + 3x + -2x2 = 257 + 2x2 + -257 + -2x2

Reorder the terms:
-257 + 3x + -2x2 = 257 + -257 + 2x2 + -2x2

Combine like terms: 257 + -257 = 0
-257 + 3x + -2x2 = 0 + 2x2 + -2x2
-257 + 3x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-257 + 3x + -2x2 = 0

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

Divide each side by '-2'.
128.5 + -1.5x + x2 = 0

Move the constant term to the right:

Add '-128.5' to each side of the equation.
128.5 + -1.5x + -128.5 + x2 = 0 + -128.5

Reorder the terms:
128.5 + -128.5 + -1.5x + x2 = 0 + -128.5

Combine like terms: 128.5 + -128.5 = 0.0
0.0 + -1.5x + x2 = 0 + -128.5
-1.5x + x2 = 0 + -128.5

Combine like terms: 0 + -128.5 = -128.5
-1.5x + x2 = -128.5

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 = -128.5 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = -128.5 + 0.5625

Combine like terms: -128.5 + 0.5625 = -127.9375
0.5625 + -1.5x + x2 = -127.9375

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = -127.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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