(x+1)*(x+3)=x^2+11

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Solution for (x+1)*(x+3)=x^2+11 equation:


Simplifying
(x + 1)(x + 3) = x2 + 11

Reorder the terms:
(1 + x)(x + 3) = x2 + 11

Reorder the terms:
(1 + x)(3 + x) = x2 + 11

Multiply (1 + x) * (3 + x)
(1(3 + x) + x(3 + x)) = x2 + 11
((3 * 1 + x * 1) + x(3 + x)) = x2 + 11
((3 + 1x) + x(3 + x)) = x2 + 11
(3 + 1x + (3 * x + x * x)) = x2 + 11
(3 + 1x + (3x + x2)) = x2 + 11

Combine like terms: 1x + 3x = 4x
(3 + 4x + x2) = x2 + 11

Reorder the terms:
3 + 4x + x2 = 11 + x2

Add '-1x2' to each side of the equation.
3 + 4x + x2 + -1x2 = 11 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
3 + 4x + 0 = 11 + x2 + -1x2
3 + 4x = 11 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
3 + 4x = 11 + 0
3 + 4x = 11

Solving
3 + 4x = 11

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 + 4x = 11 + -3

Combine like terms: 3 + -3 = 0
0 + 4x = 11 + -3
4x = 11 + -3

Combine like terms: 11 + -3 = 8
4x = 8

Divide each side by '4'.
x = 2

Simplifying
x = 2

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