7x^2-3x+20=0

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Solution for 7x^2-3x+20=0 equation:


Simplifying
7x2 + -3x + 20 = 0

Reorder the terms:
20 + -3x + 7x2 = 0

Solving
20 + -3x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
2.857142857 + -0.4285714286x + x2 = 0

Move the constant term to the right:

Add '-2.857142857' to each side of the equation.
2.857142857 + -0.4285714286x + -2.857142857 + x2 = 0 + -2.857142857

Reorder the terms:
2.857142857 + -2.857142857 + -0.4285714286x + x2 = 0 + -2.857142857

Combine like terms: 2.857142857 + -2.857142857 = 0.000000000
0.000000000 + -0.4285714286x + x2 = 0 + -2.857142857
-0.4285714286x + x2 = 0 + -2.857142857

Combine like terms: 0 + -2.857142857 = -2.857142857
-0.4285714286x + x2 = -2.857142857

The x term is -0.4285714286x.  Take half its coefficient (-0.2142857143).
Square it (0.04591836735) and add it to both sides.

Add '0.04591836735' to each side of the equation.
-0.4285714286x + 0.04591836735 + x2 = -2.857142857 + 0.04591836735

Reorder the terms:
0.04591836735 + -0.4285714286x + x2 = -2.857142857 + 0.04591836735

Combine like terms: -2.857142857 + 0.04591836735 = -2.81122448965
0.04591836735 + -0.4285714286x + x2 = -2.81122448965

Factor a perfect square on the left side:
(x + -0.2142857143)(x + -0.2142857143) = -2.81122448965

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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