3x^2+29x-8.9=0

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Solution for 3x^2+29x-8.9=0 equation:


Simplifying
3x2 + 29x + -8.9 = 0

Reorder the terms:
-8.9 + 29x + 3x2 = 0

Solving
-8.9 + 29x + 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'.
-2.966666667 + 9.666666667x + x2 = 0

Move the constant term to the right:

Add '2.966666667' to each side of the equation.
-2.966666667 + 9.666666667x + 2.966666667 + x2 = 0 + 2.966666667

Reorder the terms:
-2.966666667 + 2.966666667 + 9.666666667x + x2 = 0 + 2.966666667

Combine like terms: -2.966666667 + 2.966666667 = 0.000000000
0.000000000 + 9.666666667x + x2 = 0 + 2.966666667
9.666666667x + x2 = 0 + 2.966666667

Combine like terms: 0 + 2.966666667 = 2.966666667
9.666666667x + x2 = 2.966666667

The x term is 9.666666667x.  Take half its coefficient (4.833333334).
Square it (23.36111112) and add it to both sides.

Add '23.36111112' to each side of the equation.
9.666666667x + 23.36111112 + x2 = 2.966666667 + 23.36111112

Reorder the terms:
23.36111112 + 9.666666667x + x2 = 2.966666667 + 23.36111112

Combine like terms: 2.966666667 + 23.36111112 = 26.327777787
23.36111112 + 9.666666667x + x2 = 26.327777787

Factor a perfect square on the left side:
(x + 4.833333334)(x + 4.833333334) = 26.327777787

Calculate the square root of the right side: 5.131060104

Break this problem into two subproblems by setting 
(x + 4.833333334) equal to 5.131060104 and -5.131060104.

Subproblem 1

x + 4.833333334 = 5.131060104 Simplifying x + 4.833333334 = 5.131060104 Reorder the terms: 4.833333334 + x = 5.131060104 Solving 4.833333334 + x = 5.131060104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.833333334' to each side of the equation. 4.833333334 + -4.833333334 + x = 5.131060104 + -4.833333334 Combine like terms: 4.833333334 + -4.833333334 = 0.000000000 0.000000000 + x = 5.131060104 + -4.833333334 x = 5.131060104 + -4.833333334 Combine like terms: 5.131060104 + -4.833333334 = 0.29772677 x = 0.29772677 Simplifying x = 0.29772677

Subproblem 2

x + 4.833333334 = -5.131060104 Simplifying x + 4.833333334 = -5.131060104 Reorder the terms: 4.833333334 + x = -5.131060104 Solving 4.833333334 + x = -5.131060104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.833333334' to each side of the equation. 4.833333334 + -4.833333334 + x = -5.131060104 + -4.833333334 Combine like terms: 4.833333334 + -4.833333334 = 0.000000000 0.000000000 + x = -5.131060104 + -4.833333334 x = -5.131060104 + -4.833333334 Combine like terms: -5.131060104 + -4.833333334 = -9.964393438 x = -9.964393438 Simplifying x = -9.964393438

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.29772677, -9.964393438}

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