9x^2=-77+18x

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Solution for 9x^2=-77+18x equation:


Simplifying
9x2 = -77 + 18x

Solving
9x2 = -77 + 18x

Solving for variable 'x'.

Reorder the terms:
77 + -18x + 9x2 = -77 + 18x + 77 + -18x

Reorder the terms:
77 + -18x + 9x2 = -77 + 77 + 18x + -18x

Combine like terms: -77 + 77 = 0
77 + -18x + 9x2 = 0 + 18x + -18x
77 + -18x + 9x2 = 18x + -18x

Combine like terms: 18x + -18x = 0
77 + -18x + 9x2 = 0

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

Divide each side by '9'.
8.555555556 + -2x + x2 = 0

Move the constant term to the right:

Add '-8.555555556' to each side of the equation.
8.555555556 + -2x + -8.555555556 + x2 = 0 + -8.555555556

Reorder the terms:
8.555555556 + -8.555555556 + -2x + x2 = 0 + -8.555555556

Combine like terms: 8.555555556 + -8.555555556 = 0.000000000
0.000000000 + -2x + x2 = 0 + -8.555555556
-2x + x2 = 0 + -8.555555556

Combine like terms: 0 + -8.555555556 = -8.555555556
-2x + x2 = -8.555555556

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 = -8.555555556 + 1

Reorder the terms:
1 + -2x + x2 = -8.555555556 + 1

Combine like terms: -8.555555556 + 1 = -7.555555556
1 + -2x + x2 = -7.555555556

Factor a perfect square on the left side:
(x + -1)(x + -1) = -7.555555556

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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