3x^2+17x-76=

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Solution for 3x^2+17x-76= equation:


Simplifying
3x2 + 17x + -76 = 0

Reorder the terms:
-76 + 17x + 3x2 = 0

Solving
-76 + 17x + 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'.
-25.33333333 + 5.666666667x + x2 = 0

Move the constant term to the right:

Add '25.33333333' to each side of the equation.
-25.33333333 + 5.666666667x + 25.33333333 + x2 = 0 + 25.33333333

Reorder the terms:
-25.33333333 + 25.33333333 + 5.666666667x + x2 = 0 + 25.33333333

Combine like terms: -25.33333333 + 25.33333333 = 0.00000000
0.00000000 + 5.666666667x + x2 = 0 + 25.33333333
5.666666667x + x2 = 0 + 25.33333333

Combine like terms: 0 + 25.33333333 = 25.33333333
5.666666667x + x2 = 25.33333333

The x term is 5.666666667x.  Take half its coefficient (2.833333334).
Square it (8.027777782) and add it to both sides.

Add '8.027777782' to each side of the equation.
5.666666667x + 8.027777782 + x2 = 25.33333333 + 8.027777782

Reorder the terms:
8.027777782 + 5.666666667x + x2 = 25.33333333 + 8.027777782

Combine like terms: 25.33333333 + 8.027777782 = 33.361111112
8.027777782 + 5.666666667x + x2 = 33.361111112

Factor a perfect square on the left side:
(x + 2.833333334)(x + 2.833333334) = 33.361111112

Calculate the square root of the right side: 5.775907817

Break this problem into two subproblems by setting 
(x + 2.833333334) equal to 5.775907817 and -5.775907817.

Subproblem 1

x + 2.833333334 = 5.775907817 Simplifying x + 2.833333334 = 5.775907817 Reorder the terms: 2.833333334 + x = 5.775907817 Solving 2.833333334 + x = 5.775907817 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.833333334' to each side of the equation. 2.833333334 + -2.833333334 + x = 5.775907817 + -2.833333334 Combine like terms: 2.833333334 + -2.833333334 = 0.000000000 0.000000000 + x = 5.775907817 + -2.833333334 x = 5.775907817 + -2.833333334 Combine like terms: 5.775907817 + -2.833333334 = 2.942574483 x = 2.942574483 Simplifying x = 2.942574483

Subproblem 2

x + 2.833333334 = -5.775907817 Simplifying x + 2.833333334 = -5.775907817 Reorder the terms: 2.833333334 + x = -5.775907817 Solving 2.833333334 + x = -5.775907817 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.833333334' to each side of the equation. 2.833333334 + -2.833333334 + x = -5.775907817 + -2.833333334 Combine like terms: 2.833333334 + -2.833333334 = 0.000000000 0.000000000 + x = -5.775907817 + -2.833333334 x = -5.775907817 + -2.833333334 Combine like terms: -5.775907817 + -2.833333334 = -8.609241151 x = -8.609241151 Simplifying x = -8.609241151

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.942574483, -8.609241151}

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