9x^2-36x+40=0

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Solution for 9x^2-36x+40=0 equation:


Simplifying
9x2 + -36x + 40 = 0

Reorder the terms:
40 + -36x + 9x2 = 0

Solving
40 + -36x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
4.444444444 + -4x + x2 = 0

Move the constant term to the right:

Add '-4.444444444' to each side of the equation.
4.444444444 + -4x + -4.444444444 + x2 = 0 + -4.444444444

Reorder the terms:
4.444444444 + -4.444444444 + -4x + x2 = 0 + -4.444444444

Combine like terms: 4.444444444 + -4.444444444 = 0.000000000
0.000000000 + -4x + x2 = 0 + -4.444444444
-4x + x2 = 0 + -4.444444444

Combine like terms: 0 + -4.444444444 = -4.444444444
-4x + x2 = -4.444444444

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = -4.444444444 + 4

Reorder the terms:
4 + -4x + x2 = -4.444444444 + 4

Combine like terms: -4.444444444 + 4 = -0.444444444
4 + -4x + x2 = -0.444444444

Factor a perfect square on the left side:
(x + -2)(x + -2) = -0.444444444

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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