90x-1.5x^2=1200000

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Solution for 90x-1.5x^2=1200000 equation:


Simplifying
90x + -1.5x2 = 1200000

Solving
90x + -1.5x2 = 1200000

Solving for variable 'x'.

Reorder the terms:
-1200000 + 90x + -1.5x2 = 1200000 + -1200000

Combine like terms: 1200000 + -1200000 = 0
-1200000 + 90x + -1.5x2 = 0

Begin completing the square.  Divide all terms by
-1.5 the coefficient of the squared term: 

Divide each side by '-1.5'.
800000 + -60x + x2 = 0

Move the constant term to the right:

Add '-800000' to each side of the equation.
800000 + -60x + -800000 + x2 = 0 + -800000

Reorder the terms:
800000 + -800000 + -60x + x2 = 0 + -800000

Combine like terms: 800000 + -800000 = 0
0 + -60x + x2 = 0 + -800000
-60x + x2 = 0 + -800000

Combine like terms: 0 + -800000 = -800000
-60x + x2 = -800000

The x term is -60x.  Take half its coefficient (-30).
Square it (900) and add it to both sides.

Add '900' to each side of the equation.
-60x + 900 + x2 = -800000 + 900

Reorder the terms:
900 + -60x + x2 = -800000 + 900

Combine like terms: -800000 + 900 = -799100
900 + -60x + x2 = -799100

Factor a perfect square on the left side:
(x + -30)(x + -30) = -799100

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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