-3x^2+60x+4000=0

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Solution for -3x^2+60x+4000=0 equation:


Simplifying
-3x2 + 60x + 4000 = 0

Reorder the terms:
4000 + 60x + -3x2 = 0

Solving
4000 + 60x + -3x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-1333.333333 + -20x + x2 = 0

Move the constant term to the right:

Add '1333.333333' to each side of the equation.
-1333.333333 + -20x + 1333.333333 + x2 = 0 + 1333.333333

Reorder the terms:
-1333.333333 + 1333.333333 + -20x + x2 = 0 + 1333.333333

Combine like terms: -1333.333333 + 1333.333333 = 0.000000
0.000000 + -20x + x2 = 0 + 1333.333333
-20x + x2 = 0 + 1333.333333

Combine like terms: 0 + 1333.333333 = 1333.333333
-20x + x2 = 1333.333333

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 = 1333.333333 + 100

Reorder the terms:
100 + -20x + x2 = 1333.333333 + 100

Combine like terms: 1333.333333 + 100 = 1433.333333
100 + -20x + x2 = 1433.333333

Factor a perfect square on the left side:
(x + -10)(x + -10) = 1433.333333

Calculate the square root of the right side: 37.859388968

Break this problem into two subproblems by setting 
(x + -10) equal to 37.859388968 and -37.859388968.

Subproblem 1

x + -10 = 37.859388968 Simplifying x + -10 = 37.859388968 Reorder the terms: -10 + x = 37.859388968 Solving -10 + x = 37.859388968 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = 37.859388968 + 10 Combine like terms: -10 + 10 = 0 0 + x = 37.859388968 + 10 x = 37.859388968 + 10 Combine like terms: 37.859388968 + 10 = 47.859388968 x = 47.859388968 Simplifying x = 47.859388968

Subproblem 2

x + -10 = -37.859388968 Simplifying x + -10 = -37.859388968 Reorder the terms: -10 + x = -37.859388968 Solving -10 + x = -37.859388968 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = -37.859388968 + 10 Combine like terms: -10 + 10 = 0 0 + x = -37.859388968 + 10 x = -37.859388968 + 10 Combine like terms: -37.859388968 + 10 = -27.859388968 x = -27.859388968 Simplifying x = -27.859388968

Solution

The solution to the problem is based on the solutions from the subproblems. x = {47.859388968, -27.859388968}

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