30-6x+0.3x^2=0

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Solution for 30-6x+0.3x^2=0 equation:


Simplifying
30 + -6x + 0.3x2 = 0

Solving
30 + -6x + 0.3x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.3'.
100 + -20x + x2 = 0

Move the constant term to the right:

Add '-100' to each side of the equation.
100 + -20x + -100 + x2 = 0 + -100

Reorder the terms:
100 + -100 + -20x + x2 = 0 + -100

Combine like terms: 100 + -100 = 0
0 + -20x + x2 = 0 + -100
-20x + x2 = 0 + -100

Combine like terms: 0 + -100 = -100
-20x + x2 = -100

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 = -100 + 100

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

Combine like terms: -100 + 100 = 0
100 + -20x + x2 = 0

Factor a perfect square on the left side:
(x + -10)(x + -10) = 0

Calculate the square root of the right side: 0

Break this problem into two subproblems by setting 
(x + -10) equal to 0 and 0.

Subproblem 1

x + -10 = 0 Simplifying x + -10 = 0 Reorder the terms: -10 + x = 0 Solving -10 + x = 0 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 = 0 + 10 Combine like terms: -10 + 10 = 0 0 + x = 0 + 10 x = 0 + 10 Combine like terms: 0 + 10 = 10 x = 10 Simplifying x = 10

Subproblem 2

x + -10 = 0 Simplifying x + -10 = 0 Reorder the terms: -10 + x = 0 Solving -10 + x = 0 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 = 0 + 10 Combine like terms: -10 + 10 = 0 0 + x = 0 + 10 x = 0 + 10 Combine like terms: 0 + 10 = 10 x = 10 Simplifying x = 10

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10, 10}

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