(x+5)(x+3)-x=x^2+1

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Solution for (x+5)(x+3)-x=x^2+1 equation:


Simplifying
(x + 5)(x + 3) + -1x = x2 + 1

Reorder the terms:
(5 + x)(x + 3) + -1x = x2 + 1

Reorder the terms:
(5 + x)(3 + x) + -1x = x2 + 1

Multiply (5 + x) * (3 + x)
(5(3 + x) + x(3 + x)) + -1x = x2 + 1
((3 * 5 + x * 5) + x(3 + x)) + -1x = x2 + 1
((15 + 5x) + x(3 + x)) + -1x = x2 + 1
(15 + 5x + (3 * x + x * x)) + -1x = x2 + 1
(15 + 5x + (3x + x2)) + -1x = x2 + 1

Combine like terms: 5x + 3x = 8x
(15 + 8x + x2) + -1x = x2 + 1

Reorder the terms:
15 + 8x + -1x + x2 = x2 + 1

Combine like terms: 8x + -1x = 7x
15 + 7x + x2 = x2 + 1

Reorder the terms:
15 + 7x + x2 = 1 + x2

Add '-1x2' to each side of the equation.
15 + 7x + x2 + -1x2 = 1 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
15 + 7x + 0 = 1 + x2 + -1x2
15 + 7x = 1 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
15 + 7x = 1 + 0
15 + 7x = 1

Solving
15 + 7x = 1

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + 7x = 1 + -15

Combine like terms: 15 + -15 = 0
0 + 7x = 1 + -15
7x = 1 + -15

Combine like terms: 1 + -15 = -14
7x = -14

Divide each side by '7'.
x = -2

Simplifying
x = -2

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