400000=-15x^2+64x+360

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Solution for 400000=-15x^2+64x+360 equation:


Simplifying
400000 = -15x2 + 64x + 360

Reorder the terms:
400000 = 360 + 64x + -15x2

Solving
400000 = 360 + 64x + -15x2

Solving for variable 'x'.

Combine like terms: 400000 + -360 = 399640
399640 + -64x + 15x2 = 360 + 64x + -15x2 + -360 + -64x + 15x2

Reorder the terms:
399640 + -64x + 15x2 = 360 + -360 + 64x + -64x + -15x2 + 15x2

Combine like terms: 360 + -360 = 0
399640 + -64x + 15x2 = 0 + 64x + -64x + -15x2 + 15x2
399640 + -64x + 15x2 = 64x + -64x + -15x2 + 15x2

Combine like terms: 64x + -64x = 0
399640 + -64x + 15x2 = 0 + -15x2 + 15x2
399640 + -64x + 15x2 = -15x2 + 15x2

Combine like terms: -15x2 + 15x2 = 0
399640 + -64x + 15x2 = 0

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

Divide each side by '15'.
26642.66667 + -4.266666667x + x2 = 0

Move the constant term to the right:

Add '-26642.66667' to each side of the equation.
26642.66667 + -4.266666667x + -26642.66667 + x2 = 0 + -26642.66667

Reorder the terms:
26642.66667 + -26642.66667 + -4.266666667x + x2 = 0 + -26642.66667

Combine like terms: 26642.66667 + -26642.66667 = 0.00000
0.00000 + -4.266666667x + x2 = 0 + -26642.66667
-4.266666667x + x2 = 0 + -26642.66667

Combine like terms: 0 + -26642.66667 = -26642.66667
-4.266666667x + x2 = -26642.66667

The x term is -4.266666667x.  Take half its coefficient (-2.133333334).
Square it (4.551111114) and add it to both sides.

Add '4.551111114' to each side of the equation.
-4.266666667x + 4.551111114 + x2 = -26642.66667 + 4.551111114

Reorder the terms:
4.551111114 + -4.266666667x + x2 = -26642.66667 + 4.551111114

Combine like terms: -26642.66667 + 4.551111114 = -26638.115558886
4.551111114 + -4.266666667x + x2 = -26638.115558886

Factor a perfect square on the left side:
(x + -2.133333334)(x + -2.133333334) = -26638.115558886

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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