3x^2+60x+100=0

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Solution for 3x^2+60x+100=0 equation:


Simplifying
3x2 + 60x + 100 = 0

Reorder the terms:
100 + 60x + 3x2 = 0

Solving
100 + 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'.
33.33333333 + 20x + x2 = 0

Move the constant term to the right:

Add '-33.33333333' to each side of the equation.
33.33333333 + 20x + -33.33333333 + x2 = 0 + -33.33333333

Reorder the terms:
33.33333333 + -33.33333333 + 20x + x2 = 0 + -33.33333333

Combine like terms: 33.33333333 + -33.33333333 = 0.00000000
0.00000000 + 20x + x2 = 0 + -33.33333333
20x + x2 = 0 + -33.33333333

Combine like terms: 0 + -33.33333333 = -33.33333333
20x + x2 = -33.33333333

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 = -33.33333333 + 100

Reorder the terms:
100 + 20x + x2 = -33.33333333 + 100

Combine like terms: -33.33333333 + 100 = 66.66666667
100 + 20x + x2 = 66.66666667

Factor a perfect square on the left side:
(x + 10)(x + 10) = 66.66666667

Calculate the square root of the right side: 8.164965809

Break this problem into two subproblems by setting 
(x + 10) equal to 8.164965809 and -8.164965809.

Subproblem 1

x + 10 = 8.164965809 Simplifying x + 10 = 8.164965809 Reorder the terms: 10 + x = 8.164965809 Solving 10 + x = 8.164965809 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 = 8.164965809 + -10 Combine like terms: 10 + -10 = 0 0 + x = 8.164965809 + -10 x = 8.164965809 + -10 Combine like terms: 8.164965809 + -10 = -1.835034191 x = -1.835034191 Simplifying x = -1.835034191

Subproblem 2

x + 10 = -8.164965809 Simplifying x + 10 = -8.164965809 Reorder the terms: 10 + x = -8.164965809 Solving 10 + x = -8.164965809 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 = -8.164965809 + -10 Combine like terms: 10 + -10 = 0 0 + x = -8.164965809 + -10 x = -8.164965809 + -10 Combine like terms: -8.164965809 + -10 = -18.164965809 x = -18.164965809 Simplifying x = -18.164965809

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.835034191, -18.164965809}

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