3x^2+7x-41=0

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Solution for 3x^2+7x-41=0 equation:


Simplifying
3x2 + 7x + -41 = 0

Reorder the terms:
-41 + 7x + 3x2 = 0

Solving
-41 + 7x + 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'.
-13.66666667 + 2.333333333x + x2 = 0

Move the constant term to the right:

Add '13.66666667' to each side of the equation.
-13.66666667 + 2.333333333x + 13.66666667 + x2 = 0 + 13.66666667

Reorder the terms:
-13.66666667 + 13.66666667 + 2.333333333x + x2 = 0 + 13.66666667

Combine like terms: -13.66666667 + 13.66666667 = 0.00000000
0.00000000 + 2.333333333x + x2 = 0 + 13.66666667
2.333333333x + x2 = 0 + 13.66666667

Combine like terms: 0 + 13.66666667 = 13.66666667
2.333333333x + x2 = 13.66666667

The x term is 2.333333333x.  Take half its coefficient (1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
2.333333333x + 1.361111112 + x2 = 13.66666667 + 1.361111112

Reorder the terms:
1.361111112 + 2.333333333x + x2 = 13.66666667 + 1.361111112

Combine like terms: 13.66666667 + 1.361111112 = 15.027777782
1.361111112 + 2.333333333x + x2 = 15.027777782

Factor a perfect square on the left side:
(x + 1.166666667)(x + 1.166666667) = 15.027777782

Calculate the square root of the right side: 3.876567784

Break this problem into two subproblems by setting 
(x + 1.166666667) equal to 3.876567784 and -3.876567784.

Subproblem 1

x + 1.166666667 = 3.876567784 Simplifying x + 1.166666667 = 3.876567784 Reorder the terms: 1.166666667 + x = 3.876567784 Solving 1.166666667 + x = 3.876567784 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x = 3.876567784 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x = 3.876567784 + -1.166666667 x = 3.876567784 + -1.166666667 Combine like terms: 3.876567784 + -1.166666667 = 2.709901117 x = 2.709901117 Simplifying x = 2.709901117

Subproblem 2

x + 1.166666667 = -3.876567784 Simplifying x + 1.166666667 = -3.876567784 Reorder the terms: 1.166666667 + x = -3.876567784 Solving 1.166666667 + x = -3.876567784 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x = -3.876567784 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x = -3.876567784 + -1.166666667 x = -3.876567784 + -1.166666667 Combine like terms: -3.876567784 + -1.166666667 = -5.043234451 x = -5.043234451 Simplifying x = -5.043234451

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.709901117, -5.043234451}

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