3x^2-3x-x^2+20=0

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Solution for 3x^2-3x-x^2+20=0 equation:


Simplifying
3x2 + -3x + -1x2 + 20 = 0

Reorder the terms:
20 + -3x + 3x2 + -1x2 = 0

Combine like terms: 3x2 + -1x2 = 2x2
20 + -3x + 2x2 = 0

Solving
20 + -3x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
10 + -1.5x + x2 = 0

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -1.5x + -10 + x2 = 0 + -10

Reorder the terms:
10 + -10 + -1.5x + x2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -1.5x + x2 = 0 + -10
-1.5x + x2 = 0 + -10

Combine like terms: 0 + -10 = -10
-1.5x + x2 = -10

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 = -10 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = -10 + 0.5625

Combine like terms: -10 + 0.5625 = -9.4375
0.5625 + -1.5x + x2 = -9.4375

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = -9.4375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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