9x-.45x^2+10=100

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Solution for 9x-.45x^2+10=100 equation:


Simplifying
9x + -0.45x2 + 10 = 100

Reorder the terms:
10 + 9x + -0.45x2 = 100

Solving
10 + 9x + -0.45x2 = 100

Solving for variable 'x'.

Reorder the terms:
10 + -100 + 9x + -0.45x2 = 100 + -100

Combine like terms: 10 + -100 = -90
-90 + 9x + -0.45x2 = 100 + -100

Combine like terms: 100 + -100 = 0
-90 + 9x + -0.45x2 = 0

Begin completing the square.  Divide all terms by
-0.45 the coefficient of the squared term: 

Divide each side by '-0.45'.
200 + -20x + x2 = 0

Move the constant term to the right:

Add '-200' to each side of the equation.
200 + -20x + -200 + x2 = 0 + -200

Reorder the terms:
200 + -200 + -20x + x2 = 0 + -200

Combine like terms: 200 + -200 = 0
0 + -20x + x2 = 0 + -200
-20x + x2 = 0 + -200

Combine like terms: 0 + -200 = -200
-20x + x2 = -200

The x term is -20x.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20x + 100 + x2 = -200 + 100

Reorder the terms:
100 + -20x + x2 = -200 + 100

Combine like terms: -200 + 100 = -100
100 + -20x + x2 = -100

Factor a perfect square on the left side:
(x + -10)(x + -10) = -100

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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