3x^2-30x+71=0

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Solution for 3x^2-30x+71=0 equation:


Simplifying
3x2 + -30x + 71 = 0

Reorder the terms:
71 + -30x + 3x2 = 0

Solving
71 + -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'.
23.66666667 + -10x + x2 = 0

Move the constant term to the right:

Add '-23.66666667' to each side of the equation.
23.66666667 + -10x + -23.66666667 + x2 = 0 + -23.66666667

Reorder the terms:
23.66666667 + -23.66666667 + -10x + x2 = 0 + -23.66666667

Combine like terms: 23.66666667 + -23.66666667 = 0.00000000
0.00000000 + -10x + x2 = 0 + -23.66666667
-10x + x2 = 0 + -23.66666667

Combine like terms: 0 + -23.66666667 = -23.66666667
-10x + x2 = -23.66666667

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 = -23.66666667 + 25

Reorder the terms:
25 + -10x + x2 = -23.66666667 + 25

Combine like terms: -23.66666667 + 25 = 1.33333333
25 + -10x + x2 = 1.33333333

Factor a perfect square on the left side:
(x + -5)(x + -5) = 1.33333333

Calculate the square root of the right side: 1.154700537

Break this problem into two subproblems by setting 
(x + -5) equal to 1.154700537 and -1.154700537.

Subproblem 1

x + -5 = 1.154700537 Simplifying x + -5 = 1.154700537 Reorder the terms: -5 + x = 1.154700537 Solving -5 + x = 1.154700537 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 = 1.154700537 + 5 Combine like terms: -5 + 5 = 0 0 + x = 1.154700537 + 5 x = 1.154700537 + 5 Combine like terms: 1.154700537 + 5 = 6.154700537 x = 6.154700537 Simplifying x = 6.154700537

Subproblem 2

x + -5 = -1.154700537 Simplifying x + -5 = -1.154700537 Reorder the terms: -5 + x = -1.154700537 Solving -5 + x = -1.154700537 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 = -1.154700537 + 5 Combine like terms: -5 + 5 = 0 0 + x = -1.154700537 + 5 x = -1.154700537 + 5 Combine like terms: -1.154700537 + 5 = 3.845299463 x = 3.845299463 Simplifying x = 3.845299463

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.154700537, 3.845299463}

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