9x(x-2)=-25

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Solution for 9x(x-2)=-25 equation:


Simplifying
9x(x + -2) = -25

Reorder the terms:
9x(-2 + x) = -25
(-2 * 9x + x * 9x) = -25
(-18x + 9x2) = -25

Solving
-18x + 9x2 = -25

Solving for variable 'x'.

Reorder the terms:
25 + -18x + 9x2 = -25 + 25

Combine like terms: -25 + 25 = 0
25 + -18x + 9x2 = 0

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

Divide each side by '9'.
2.777777778 + -2x + x2 = 0

Move the constant term to the right:

Add '-2.777777778' to each side of the equation.
2.777777778 + -2x + -2.777777778 + x2 = 0 + -2.777777778

Reorder the terms:
2.777777778 + -2.777777778 + -2x + x2 = 0 + -2.777777778

Combine like terms: 2.777777778 + -2.777777778 = 0.000000000
0.000000000 + -2x + x2 = 0 + -2.777777778
-2x + x2 = 0 + -2.777777778

Combine like terms: 0 + -2.777777778 = -2.777777778
-2x + x2 = -2.777777778

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = -2.777777778 + 1

Reorder the terms:
1 + -2x + x2 = -2.777777778 + 1

Combine like terms: -2.777777778 + 1 = -1.777777778
1 + -2x + x2 = -1.777777778

Factor a perfect square on the left side:
(x + -1)(x + -1) = -1.777777778

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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