20x^2-20x=-9

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Solution for 20x^2-20x=-9 equation:


Simplifying
20x2 + -20x = -9

Reorder the terms:
-20x + 20x2 = -9

Solving
-20x + 20x2 = -9

Solving for variable 'x'.

Reorder the terms:
9 + -20x + 20x2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + -20x + 20x2 = 0

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

Divide each side by '20'.
0.45 + -1x + x2 = 0

Move the constant term to the right:

Add '-0.45' to each side of the equation.
0.45 + -1x + -0.45 + x2 = 0 + -0.45

Reorder the terms:
0.45 + -0.45 + -1x + x2 = 0 + -0.45

Combine like terms: 0.45 + -0.45 = 0.00
0.00 + -1x + x2 = 0 + -0.45
-1x + x2 = 0 + -0.45

Combine like terms: 0 + -0.45 = -0.45
-1x + x2 = -0.45

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = -0.45 + 0.25

Reorder the terms:
0.25 + -1x + x2 = -0.45 + 0.25

Combine like terms: -0.45 + 0.25 = -0.2
0.25 + -1x + x2 = -0.2

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = -0.2

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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