3x^2-15x+20=0

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Solution for 3x^2-15x+20=0 equation:


Simplifying
3x2 + -15x + 20 = 0

Reorder the terms:
20 + -15x + 3x2 = 0

Solving
20 + -15x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
6.666666667 + -5x + x2 = 0

Move the constant term to the right:

Add '-6.666666667' to each side of the equation.
6.666666667 + -5x + -6.666666667 + x2 = 0 + -6.666666667

Reorder the terms:
6.666666667 + -6.666666667 + -5x + x2 = 0 + -6.666666667

Combine like terms: 6.666666667 + -6.666666667 = 0.000000000
0.000000000 + -5x + x2 = 0 + -6.666666667
-5x + x2 = 0 + -6.666666667

Combine like terms: 0 + -6.666666667 = -6.666666667
-5x + x2 = -6.666666667

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -6.666666667 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -6.666666667 + 6.25

Combine like terms: -6.666666667 + 6.25 = -0.416666667
6.25 + -5x + x2 = -0.416666667

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = -0.416666667

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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