-0.08x^2+80x-1500=0

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Solution for -0.08x^2+80x-1500=0 equation:


Simplifying
-0.08x2 + 80x + -1500 = 0

Reorder the terms:
-1500 + 80x + -0.08x2 = 0

Solving
-1500 + 80x + -0.08x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.08 the coefficient of the squared term: 

Divide each side by '-0.08'.
18750 + -1000x + x2 = 0

Move the constant term to the right:

Add '-18750' to each side of the equation.
18750 + -1000x + -18750 + x2 = 0 + -18750

Reorder the terms:
18750 + -18750 + -1000x + x2 = 0 + -18750

Combine like terms: 18750 + -18750 = 0
0 + -1000x + x2 = 0 + -18750
-1000x + x2 = 0 + -18750

Combine like terms: 0 + -18750 = -18750
-1000x + x2 = -18750

The x term is -1000x.  Take half its coefficient (-500).
Square it (250000) and add it to both sides.

Add '250000' to each side of the equation.
-1000x + 250000 + x2 = -18750 + 250000

Reorder the terms:
250000 + -1000x + x2 = -18750 + 250000

Combine like terms: -18750 + 250000 = 231250
250000 + -1000x + x2 = 231250

Factor a perfect square on the left side:
(x + -500)(x + -500) = 231250

Calculate the square root of the right side: 480.884601542

Break this problem into two subproblems by setting 
(x + -500) equal to 480.884601542 and -480.884601542.

Subproblem 1

x + -500 = 480.884601542 Simplifying x + -500 = 480.884601542 Reorder the terms: -500 + x = 480.884601542 Solving -500 + x = 480.884601542 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '500' to each side of the equation. -500 + 500 + x = 480.884601542 + 500 Combine like terms: -500 + 500 = 0 0 + x = 480.884601542 + 500 x = 480.884601542 + 500 Combine like terms: 480.884601542 + 500 = 980.884601542 x = 980.884601542 Simplifying x = 980.884601542

Subproblem 2

x + -500 = -480.884601542 Simplifying x + -500 = -480.884601542 Reorder the terms: -500 + x = -480.884601542 Solving -500 + x = -480.884601542 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '500' to each side of the equation. -500 + 500 + x = -480.884601542 + 500 Combine like terms: -500 + 500 = 0 0 + x = -480.884601542 + 500 x = -480.884601542 + 500 Combine like terms: -480.884601542 + 500 = 19.115398458 x = 19.115398458 Simplifying x = 19.115398458

Solution

The solution to the problem is based on the solutions from the subproblems. x = {980.884601542, 19.115398458}

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