(x+6)(x+3)=x^2+9x+18

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Solution for (x+6)(x+3)=x^2+9x+18 equation:


Simplifying
(x + 6)(x + 3) = x2 + 9x + 18

Reorder the terms:
(6 + x)(x + 3) = x2 + 9x + 18

Reorder the terms:
(6 + x)(3 + x) = x2 + 9x + 18

Multiply (6 + x) * (3 + x)
(6(3 + x) + x(3 + x)) = x2 + 9x + 18
((3 * 6 + x * 6) + x(3 + x)) = x2 + 9x + 18
((18 + 6x) + x(3 + x)) = x2 + 9x + 18
(18 + 6x + (3 * x + x * x)) = x2 + 9x + 18
(18 + 6x + (3x + x2)) = x2 + 9x + 18

Combine like terms: 6x + 3x = 9x
(18 + 9x + x2) = x2 + 9x + 18

Reorder the terms:
18 + 9x + x2 = 18 + 9x + x2

Add '-18' to each side of the equation.
18 + 9x + -18 + x2 = 18 + 9x + -18 + x2

Reorder the terms:
18 + -18 + 9x + x2 = 18 + 9x + -18 + x2

Combine like terms: 18 + -18 = 0
0 + 9x + x2 = 18 + 9x + -18 + x2
9x + x2 = 18 + 9x + -18 + x2

Reorder the terms:
9x + x2 = 18 + -18 + 9x + x2

Combine like terms: 18 + -18 = 0
9x + x2 = 0 + 9x + x2
9x + x2 = 9x + x2

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

Combine like terms: 9x + -9x = 0
0 + x2 = 9x + -9x + x2
x2 = 9x + -9x + x2

Combine like terms: 9x + -9x = 0
x2 = 0 + x2
x2 = x2

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

Combine like terms: x2 + -1x2 = 0
0 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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