(2+3x)(2-3x)=18-7x-9x^2

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Solution for (2+3x)(2-3x)=18-7x-9x^2 equation:


Simplifying
(2 + 3x)(2 + -3x) = 18 + -7x + -9x2

Multiply (2 + 3x) * (2 + -3x)
(2(2 + -3x) + 3x * (2 + -3x)) = 18 + -7x + -9x2
((2 * 2 + -3x * 2) + 3x * (2 + -3x)) = 18 + -7x + -9x2
((4 + -6x) + 3x * (2 + -3x)) = 18 + -7x + -9x2
(4 + -6x + (2 * 3x + -3x * 3x)) = 18 + -7x + -9x2
(4 + -6x + (6x + -9x2)) = 18 + -7x + -9x2

Combine like terms: -6x + 6x = 0
(4 + 0 + -9x2) = 18 + -7x + -9x2
(4 + -9x2) = 18 + -7x + -9x2

Add '9x2' to each side of the equation.
4 + -9x2 + 9x2 = 18 + -7x + -9x2 + 9x2

Combine like terms: -9x2 + 9x2 = 0
4 + 0 = 18 + -7x + -9x2 + 9x2
4 = 18 + -7x + -9x2 + 9x2

Combine like terms: -9x2 + 9x2 = 0
4 = 18 + -7x + 0
4 = 18 + -7x

Solving
4 = 18 + -7x

Solving for variable 'x'.

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

Add '7x' to each side of the equation.
4 + 7x = 18 + -7x + 7x

Combine like terms: -7x + 7x = 0
4 + 7x = 18 + 0
4 + 7x = 18

Add '-4' to each side of the equation.
4 + -4 + 7x = 18 + -4

Combine like terms: 4 + -4 = 0
0 + 7x = 18 + -4
7x = 18 + -4

Combine like terms: 18 + -4 = 14
7x = 14

Divide each side by '7'.
x = 2

Simplifying
x = 2

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