3x^2-30x-13=

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Solution for 3x^2-30x-13= equation:


Simplifying
3x2 + -30x + -13 = 0

Reorder the terms:
-13 + -30x + 3x2 = 0

Solving
-13 + -30x + 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'.
-4.333333333 + -10x + x2 = 0

Move the constant term to the right:

Add '4.333333333' to each side of the equation.
-4.333333333 + -10x + 4.333333333 + x2 = 0 + 4.333333333

Reorder the terms:
-4.333333333 + 4.333333333 + -10x + x2 = 0 + 4.333333333

Combine like terms: -4.333333333 + 4.333333333 = 0.000000000
0.000000000 + -10x + x2 = 0 + 4.333333333
-10x + x2 = 0 + 4.333333333

Combine like terms: 0 + 4.333333333 = 4.333333333
-10x + x2 = 4.333333333

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = 4.333333333 + 25

Reorder the terms:
25 + -10x + x2 = 4.333333333 + 25

Combine like terms: 4.333333333 + 25 = 29.333333333
25 + -10x + x2 = 29.333333333

Factor a perfect square on the left side:
(x + -5)(x + -5) = 29.333333333

Calculate the square root of the right side: 5.416025603

Break this problem into two subproblems by setting 
(x + -5) equal to 5.416025603 and -5.416025603.

Subproblem 1

x + -5 = 5.416025603 Simplifying x + -5 = 5.416025603 Reorder the terms: -5 + x = 5.416025603 Solving -5 + x = 5.416025603 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 5.416025603 + 5 Combine like terms: -5 + 5 = 0 0 + x = 5.416025603 + 5 x = 5.416025603 + 5 Combine like terms: 5.416025603 + 5 = 10.416025603 x = 10.416025603 Simplifying x = 10.416025603

Subproblem 2

x + -5 = -5.416025603 Simplifying x + -5 = -5.416025603 Reorder the terms: -5 + x = -5.416025603 Solving -5 + x = -5.416025603 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -5.416025603 + 5 Combine like terms: -5 + 5 = 0 0 + x = -5.416025603 + 5 x = -5.416025603 + 5 Combine like terms: -5.416025603 + 5 = -0.416025603 x = -0.416025603 Simplifying x = -0.416025603

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.416025603, -0.416025603}

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