100=-0.001x^2+0.3x

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Solution for 100=-0.001x^2+0.3x equation:


Simplifying
100 = -0.001x2 + 0.3x

Reorder the terms:
100 = 0.3x + -0.001x2

Solving
100 = 0.3x + -0.001x2

Solving for variable 'x'.

Reorder the terms:
100 + -0.3x + 0.001x2 = 0.3x + -0.3x + -0.001x2 + 0.001x2

Combine like terms: 0.3x + -0.3x = 0.0
100 + -0.3x + 0.001x2 = 0.0 + -0.001x2 + 0.001x2
100 + -0.3x + 0.001x2 = -0.001x2 + 0.001x2

Combine like terms: -0.001x2 + 0.001x2 = 0.000
100 + -0.3x + 0.001x2 = 0.000

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

Divide each side by '0.001'.
100000 + -300x + x2 = 0

Move the constant term to the right:

Add '-100000' to each side of the equation.
100000 + -300x + -100000 + x2 = 0 + -100000

Reorder the terms:
100000 + -100000 + -300x + x2 = 0 + -100000

Combine like terms: 100000 + -100000 = 0
0 + -300x + x2 = 0 + -100000
-300x + x2 = 0 + -100000

Combine like terms: 0 + -100000 = -100000
-300x + x2 = -100000

The x term is -300x.  Take half its coefficient (-150).
Square it (22500) and add it to both sides.

Add '22500' to each side of the equation.
-300x + 22500 + x2 = -100000 + 22500

Reorder the terms:
22500 + -300x + x2 = -100000 + 22500

Combine like terms: -100000 + 22500 = -77500
22500 + -300x + x2 = -77500

Factor a perfect square on the left side:
(x + -150)(x + -150) = -77500

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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