-0.01x^2-0.3x+10=0

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Solution for -0.01x^2-0.3x+10=0 equation:


Simplifying
-0.01x2 + -0.3x + 10 = 0

Reorder the terms:
10 + -0.3x + -0.01x2 = 0

Solving
10 + -0.3x + -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'.
-1000 + 30x + x2 = 0

Move the constant term to the right:

Add '1000' to each side of the equation.
-1000 + 30x + 1000 + x2 = 0 + 1000

Reorder the terms:
-1000 + 1000 + 30x + x2 = 0 + 1000

Combine like terms: -1000 + 1000 = 0
0 + 30x + x2 = 0 + 1000
30x + x2 = 0 + 1000

Combine like terms: 0 + 1000 = 1000
30x + x2 = 1000

The x term is 30x.  Take half its coefficient (15).
Square it (225) and add it to both sides.

Add '225' to each side of the equation.
30x + 225 + x2 = 1000 + 225

Reorder the terms:
225 + 30x + x2 = 1000 + 225

Combine like terms: 1000 + 225 = 1225
225 + 30x + x2 = 1225

Factor a perfect square on the left side:
(x + 15)(x + 15) = 1225

Calculate the square root of the right side: 35

Break this problem into two subproblems by setting 
(x + 15) equal to 35 and -35.

Subproblem 1

x + 15 = 35 Simplifying x + 15 = 35 Reorder the terms: 15 + x = 35 Solving 15 + x = 35 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = 35 + -15 Combine like terms: 15 + -15 = 0 0 + x = 35 + -15 x = 35 + -15 Combine like terms: 35 + -15 = 20 x = 20 Simplifying x = 20

Subproblem 2

x + 15 = -35 Simplifying x + 15 = -35 Reorder the terms: 15 + x = -35 Solving 15 + x = -35 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = -35 + -15 Combine like terms: 15 + -15 = 0 0 + x = -35 + -15 x = -35 + -15 Combine like terms: -35 + -15 = -50 x = -50 Simplifying x = -50

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20, -50}

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