[(x+3)*(x+3)]-(x*x)=39

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Solution for [(x+3)*(x+3)]-(x*x)=39 equation:


Simplifying
[(x + 3)(x + 3)] + -1(x * x) = 39

Reorder the terms:
[(3 + x)(x + 3)] + -1(x * x) = 39

Reorder the terms:
[(3 + x)(3 + x)] + -1(x * x) = 39

Multiply (3 + x) * (3 + x)
[(3(3 + x) + x(3 + x))] + -1(x * x) = 39
[((3 * 3 + x * 3) + x(3 + x))] + -1(x * x) = 39
[((9 + 3x) + x(3 + x))] + -1(x * x) = 39
[(9 + 3x + (3 * x + x * x))] + -1(x * x) = 39
[(9 + 3x + (3x + x2))] + -1(x * x) = 39

Combine like terms: 3x + 3x = 6x
[(9 + 6x + x2)] + -1(x * x) = 39
[9 + 6x + x2] + -1(x * x) = 39

Remove brackets around [9 + 6x + x2]
9 + 6x + x2 + -1(x * x) = 39

Multiply x * x
9 + 6x + x2 + -1(x2) = 39

Combine like terms: x2 + -1x2 = 0
9 + 6x + 0 = 39
9 + 6x = 39

Solving
9 + 6x = 39

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-9' to each side of the equation.
9 + -9 + 6x = 39 + -9

Combine like terms: 9 + -9 = 0
0 + 6x = 39 + -9
6x = 39 + -9

Combine like terms: 39 + -9 = 30
6x = 30

Divide each side by '6'.
x = 5

Simplifying
x = 5

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