=9x^2-7x+18

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Solution for =9x^2-7x+18 equation:


Simplifying
0 = 9x2 + -7x + 18

Reorder the terms:
0 = 18 + -7x + 9x2

Solving
0 = 18 + -7x + 9x2

Solving for variable 'x'.

Combine like terms: 0 + -18 = -18
-18 + 7x + -9x2 = 18 + -7x + 9x2 + -18 + 7x + -9x2

Reorder the terms:
-18 + 7x + -9x2 = 18 + -18 + -7x + 7x + 9x2 + -9x2

Combine like terms: 18 + -18 = 0
-18 + 7x + -9x2 = 0 + -7x + 7x + 9x2 + -9x2
-18 + 7x + -9x2 = -7x + 7x + 9x2 + -9x2

Combine like terms: -7x + 7x = 0
-18 + 7x + -9x2 = 0 + 9x2 + -9x2
-18 + 7x + -9x2 = 9x2 + -9x2

Combine like terms: 9x2 + -9x2 = 0
-18 + 7x + -9x2 = 0

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

Divide each side by '-9'.
2 + -0.7777777778x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -0.7777777778x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -0.7777777778x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -0.7777777778x + x2 = 0 + -2
-0.7777777778x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-0.7777777778x + x2 = -2

The x term is -0.7777777778x.  Take half its coefficient (-0.3888888889).
Square it (0.1512345679) and add it to both sides.

Add '0.1512345679' to each side of the equation.
-0.7777777778x + 0.1512345679 + x2 = -2 + 0.1512345679

Reorder the terms:
0.1512345679 + -0.7777777778x + x2 = -2 + 0.1512345679

Combine like terms: -2 + 0.1512345679 = -1.8487654321
0.1512345679 + -0.7777777778x + x2 = -1.8487654321

Factor a perfect square on the left side:
(x + -0.3888888889)(x + -0.3888888889) = -1.8487654321

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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