its urgent please solve this sum.
Simplify and express as a monomial or a binomial
(i) (3x + 2)square – (3x - 2)square
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(3x+2)^2 - (3x-2)^2
= (9x^2 + 6x +6x + 4) - (9x^2-6x-6x +4)
= 9x^2+6x+6x+4-9x^2+6x+6x-4
= 9x^2-9x^2+6x+6x+6x+6x+4-4
= 24x
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