.02x^2+3x-2000=0

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Solution for .02x^2+3x-2000=0 equation:


Simplifying
0.02x2 + 3x + -2000 = 0

Reorder the terms:
-2000 + 3x + 0.02x2 = 0

Solving
-2000 + 3x + 0.02x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.02'.
-100000 + 150x + x2 = 0

Move the constant term to the right:

Add '100000' to each side of the equation.
-100000 + 150x + 100000 + x2 = 0 + 100000

Reorder the terms:
-100000 + 100000 + 150x + x2 = 0 + 100000

Combine like terms: -100000 + 100000 = 0
0 + 150x + x2 = 0 + 100000
150x + x2 = 0 + 100000

Combine like terms: 0 + 100000 = 100000
150x + x2 = 100000

The x term is 150x.  Take half its coefficient (75).
Square it (5625) and add it to both sides.

Add '5625' to each side of the equation.
150x + 5625 + x2 = 100000 + 5625

Reorder the terms:
5625 + 150x + x2 = 100000 + 5625

Combine like terms: 100000 + 5625 = 105625
5625 + 150x + x2 = 105625

Factor a perfect square on the left side:
(x + 75)(x + 75) = 105625

Calculate the square root of the right side: 325

Break this problem into two subproblems by setting 
(x + 75) equal to 325 and -325.

Subproblem 1

x + 75 = 325 Simplifying x + 75 = 325 Reorder the terms: 75 + x = 325 Solving 75 + x = 325 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-75' to each side of the equation. 75 + -75 + x = 325 + -75 Combine like terms: 75 + -75 = 0 0 + x = 325 + -75 x = 325 + -75 Combine like terms: 325 + -75 = 250 x = 250 Simplifying x = 250

Subproblem 2

x + 75 = -325 Simplifying x + 75 = -325 Reorder the terms: 75 + x = -325 Solving 75 + x = -325 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-75' to each side of the equation. 75 + -75 + x = -325 + -75 Combine like terms: 75 + -75 = 0 0 + x = -325 + -75 x = -325 + -75 Combine like terms: -325 + -75 = -400 x = -400 Simplifying x = -400

Solution

The solution to the problem is based on the solutions from the subproblems. x = {250, -400}

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