-3x(x+9)+10x=-34

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Solution for -3x(x+9)+10x=-34 equation:


Simplifying
-3x(x + 9) + 10x = -34

Reorder the terms:
-3x(9 + x) + 10x = -34
(9 * -3x + x * -3x) + 10x = -34
(-27x + -3x2) + 10x = -34

Reorder the terms:
-27x + 10x + -3x2 = -34

Combine like terms: -27x + 10x = -17x
-17x + -3x2 = -34

Solving
-17x + -3x2 = -34

Solving for variable 'x'.

Reorder the terms:
34 + -17x + -3x2 = -34 + 34

Combine like terms: -34 + 34 = 0
34 + -17x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-11.33333333 + 5.666666667x + x2 = 0

Move the constant term to the right:

Add '11.33333333' to each side of the equation.
-11.33333333 + 5.666666667x + 11.33333333 + x2 = 0 + 11.33333333

Reorder the terms:
-11.33333333 + 11.33333333 + 5.666666667x + x2 = 0 + 11.33333333

Combine like terms: -11.33333333 + 11.33333333 = 0.00000000
0.00000000 + 5.666666667x + x2 = 0 + 11.33333333
5.666666667x + x2 = 0 + 11.33333333

Combine like terms: 0 + 11.33333333 = 11.33333333
5.666666667x + x2 = 11.33333333

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 = 11.33333333 + 8.027777782

Reorder the terms:
8.027777782 + 5.666666667x + x2 = 11.33333333 + 8.027777782

Combine like terms: 11.33333333 + 8.027777782 = 19.361111112
8.027777782 + 5.666666667x + x2 = 19.361111112

Factor a perfect square on the left side:
(x + 2.833333334)(x + 2.833333334) = 19.361111112

Calculate the square root of the right side: 4.400126261

Break this problem into two subproblems by setting 
(x + 2.833333334) equal to 4.400126261 and -4.400126261.

Subproblem 1

x + 2.833333334 = 4.400126261 Simplifying x + 2.833333334 = 4.400126261 Reorder the terms: 2.833333334 + x = 4.400126261 Solving 2.833333334 + x = 4.400126261 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 = 4.400126261 + -2.833333334 Combine like terms: 2.833333334 + -2.833333334 = 0.000000000 0.000000000 + x = 4.400126261 + -2.833333334 x = 4.400126261 + -2.833333334 Combine like terms: 4.400126261 + -2.833333334 = 1.566792927 x = 1.566792927 Simplifying x = 1.566792927

Subproblem 2

x + 2.833333334 = -4.400126261 Simplifying x + 2.833333334 = -4.400126261 Reorder the terms: 2.833333334 + x = -4.400126261 Solving 2.833333334 + x = -4.400126261 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 = -4.400126261 + -2.833333334 Combine like terms: 2.833333334 + -2.833333334 = 0.000000000 0.000000000 + x = -4.400126261 + -2.833333334 x = -4.400126261 + -2.833333334 Combine like terms: -4.400126261 + -2.833333334 = -7.233459595 x = -7.233459595 Simplifying x = -7.233459595

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.566792927, -7.233459595}

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