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

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


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

Multiply (3 + x) * (3 + x)
(3(3 + x) + x(3 + x)) = 17
((3 * 3 + x * 3) + x(3 + x)) = 17
((9 + 3x) + x(3 + x)) = 17
(9 + 3x + (3 * x + x * x)) = 17
(9 + 3x + (3x + x2)) = 17

Combine like terms: 3x + 3x = 6x
(9 + 6x + x2) = 17

Solving
9 + 6x + x2 = 17

Solving for variable 'x'.

Reorder the terms:
9 + -17 + 6x + x2 = 17 + -17

Combine like terms: 9 + -17 = -8
-8 + 6x + x2 = 17 + -17

Combine like terms: 17 + -17 = 0
-8 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + 6x + 8 + x2 = 0 + 8

Reorder the terms:
-8 + 8 + 6x + x2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 6x + x2 = 0 + 8
6x + x2 = 0 + 8

Combine like terms: 0 + 8 = 8
6x + x2 = 8

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 8 + 9

Reorder the terms:
9 + 6x + x2 = 8 + 9

Combine like terms: 8 + 9 = 17
9 + 6x + x2 = 17

Factor a perfect square on the left side:
(x + 3)(x + 3) = 17

Calculate the square root of the right side: 4.123105626

Break this problem into two subproblems by setting 
(x + 3) equal to 4.123105626 and -4.123105626.

Subproblem 1

x + 3 = 4.123105626 Simplifying x + 3 = 4.123105626 Reorder the terms: 3 + x = 4.123105626 Solving 3 + x = 4.123105626 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 4.123105626 + -3 Combine like terms: 3 + -3 = 0 0 + x = 4.123105626 + -3 x = 4.123105626 + -3 Combine like terms: 4.123105626 + -3 = 1.123105626 x = 1.123105626 Simplifying x = 1.123105626

Subproblem 2

x + 3 = -4.123105626 Simplifying x + 3 = -4.123105626 Reorder the terms: 3 + x = -4.123105626 Solving 3 + x = -4.123105626 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -4.123105626 + -3 Combine like terms: 3 + -3 = 0 0 + x = -4.123105626 + -3 x = -4.123105626 + -3 Combine like terms: -4.123105626 + -3 = -7.123105626 x = -7.123105626 Simplifying x = -7.123105626

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.123105626, -7.123105626}

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