(3x+5)(3x+5)=17

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Solution for (3x+5)(3x+5)=17 equation:


Simplifying
(3x + 5)(3x + 5) = 17

Reorder the terms:
(5 + 3x)(3x + 5) = 17

Reorder the terms:
(5 + 3x)(5 + 3x) = 17

Multiply (5 + 3x) * (5 + 3x)
(5(5 + 3x) + 3x * (5 + 3x)) = 17
((5 * 5 + 3x * 5) + 3x * (5 + 3x)) = 17
((25 + 15x) + 3x * (5 + 3x)) = 17
(25 + 15x + (5 * 3x + 3x * 3x)) = 17
(25 + 15x + (15x + 9x2)) = 17

Combine like terms: 15x + 15x = 30x
(25 + 30x + 9x2) = 17

Solving
25 + 30x + 9x2 = 17

Solving for variable 'x'.

Reorder the terms:
25 + -17 + 30x + 9x2 = 17 + -17

Combine like terms: 25 + -17 = 8
8 + 30x + 9x2 = 17 + -17

Combine like terms: 17 + -17 = 0
8 + 30x + 9x2 = 0

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

Divide each side by '9'.
0.8888888889 + 3.333333333x + x2 = 0

Move the constant term to the right:

Add '-0.8888888889' to each side of the equation.
0.8888888889 + 3.333333333x + -0.8888888889 + x2 = 0 + -0.8888888889

Reorder the terms:
0.8888888889 + -0.8888888889 + 3.333333333x + x2 = 0 + -0.8888888889

Combine like terms: 0.8888888889 + -0.8888888889 = 0.0000000000
0.0000000000 + 3.333333333x + x2 = 0 + -0.8888888889
3.333333333x + x2 = 0 + -0.8888888889

Combine like terms: 0 + -0.8888888889 = -0.8888888889
3.333333333x + x2 = -0.8888888889

The x term is 3.333333333x.  Take half its coefficient (1.666666667).
Square it (2.777777779) and add it to both sides.

Add '2.777777779' to each side of the equation.
3.333333333x + 2.777777779 + x2 = -0.8888888889 + 2.777777779

Reorder the terms:
2.777777779 + 3.333333333x + x2 = -0.8888888889 + 2.777777779

Combine like terms: -0.8888888889 + 2.777777779 = 1.8888888901
2.777777779 + 3.333333333x + x2 = 1.8888888901

Factor a perfect square on the left side:
(x + 1.666666667)(x + 1.666666667) = 1.8888888901

Calculate the square root of the right side: 1.374368542

Break this problem into two subproblems by setting 
(x + 1.666666667) equal to 1.374368542 and -1.374368542.

Subproblem 1

x + 1.666666667 = 1.374368542 Simplifying x + 1.666666667 = 1.374368542 Reorder the terms: 1.666666667 + x = 1.374368542 Solving 1.666666667 + x = 1.374368542 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.666666667' to each side of the equation. 1.666666667 + -1.666666667 + x = 1.374368542 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + x = 1.374368542 + -1.666666667 x = 1.374368542 + -1.666666667 Combine like terms: 1.374368542 + -1.666666667 = -0.292298125 x = -0.292298125 Simplifying x = -0.292298125

Subproblem 2

x + 1.666666667 = -1.374368542 Simplifying x + 1.666666667 = -1.374368542 Reorder the terms: 1.666666667 + x = -1.374368542 Solving 1.666666667 + x = -1.374368542 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.666666667' to each side of the equation. 1.666666667 + -1.666666667 + x = -1.374368542 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + x = -1.374368542 + -1.666666667 x = -1.374368542 + -1.666666667 Combine like terms: -1.374368542 + -1.666666667 = -3.041035209 x = -3.041035209 Simplifying x = -3.041035209

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.292298125, -3.041035209}

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