-0.01x^2-2x+300=0

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Solution for -0.01x^2-2x+300=0 equation:


Simplifying
-0.01x2 + -2x + 300 = 0

Reorder the terms:
300 + -2x + -0.01x2 = 0

Solving
300 + -2x + -0.01x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.01 the coefficient of the squared term: 

Divide each side by '-0.01'.
-30000 + 200x + x2 = 0

Move the constant term to the right:

Add '30000' to each side of the equation.
-30000 + 200x + 30000 + x2 = 0 + 30000

Reorder the terms:
-30000 + 30000 + 200x + x2 = 0 + 30000

Combine like terms: -30000 + 30000 = 0
0 + 200x + x2 = 0 + 30000
200x + x2 = 0 + 30000

Combine like terms: 0 + 30000 = 30000
200x + x2 = 30000

The x term is 200x.  Take half its coefficient (100).
Square it (10000) and add it to both sides.

Add '10000' to each side of the equation.
200x + 10000 + x2 = 30000 + 10000

Reorder the terms:
10000 + 200x + x2 = 30000 + 10000

Combine like terms: 30000 + 10000 = 40000
10000 + 200x + x2 = 40000

Factor a perfect square on the left side:
(x + 100)(x + 100) = 40000

Calculate the square root of the right side: 200

Break this problem into two subproblems by setting 
(x + 100) equal to 200 and -200.

Subproblem 1

x + 100 = 200 Simplifying x + 100 = 200 Reorder the terms: 100 + x = 200 Solving 100 + x = 200 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-100' to each side of the equation. 100 + -100 + x = 200 + -100 Combine like terms: 100 + -100 = 0 0 + x = 200 + -100 x = 200 + -100 Combine like terms: 200 + -100 = 100 x = 100 Simplifying x = 100

Subproblem 2

x + 100 = -200 Simplifying x + 100 = -200 Reorder the terms: 100 + x = -200 Solving 100 + x = -200 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-100' to each side of the equation. 100 + -100 + x = -200 + -100 Combine like terms: 100 + -100 = 0 0 + x = -200 + -100 x = -200 + -100 Combine like terms: -200 + -100 = -300 x = -300 Simplifying x = -300

Solution

The solution to the problem is based on the solutions from the subproblems. x = {100, -300}

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