(x+1)*(x+1)-x*x-39=0

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Solution for (x+1)*(x+1)-x*x-39=0 equation:


Simplifying
(x + 1)(x + 1) + -1x * x + -39 = 0

Reorder the terms:
(1 + x)(x + 1) + -1x * x + -39 = 0

Reorder the terms:
(1 + x)(1 + x) + -1x * x + -39 = 0

Multiply (1 + x) * (1 + x)
(1(1 + x) + x(1 + x)) + -1x * x + -39 = 0
((1 * 1 + x * 1) + x(1 + x)) + -1x * x + -39 = 0
((1 + 1x) + x(1 + x)) + -1x * x + -39 = 0
(1 + 1x + (1 * x + x * x)) + -1x * x + -39 = 0
(1 + 1x + (1x + x2)) + -1x * x + -39 = 0

Combine like terms: 1x + 1x = 2x
(1 + 2x + x2) + -1x * x + -39 = 0

Multiply x * x
1 + 2x + x2 + -1x2 + -39 = 0

Reorder the terms:
1 + -39 + 2x + x2 + -1x2 = 0

Combine like terms: 1 + -39 = -38
-38 + 2x + x2 + -1x2 = 0

Combine like terms: x2 + -1x2 = 0
-38 + 2x + 0 = 0
-38 + 2x = 0

Solving
-38 + 2x = 0

Solving for variable 'x'.

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

Add '38' to each side of the equation.
-38 + 38 + 2x = 0 + 38

Combine like terms: -38 + 38 = 0
0 + 2x = 0 + 38
2x = 0 + 38

Combine like terms: 0 + 38 = 38
2x = 38

Divide each side by '2'.
x = 19

Simplifying
x = 19

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