Answer:
9y^2-4
Explanation:
(3y-2)(3y+2)
9y^2-6y+6y-4
=9y^2−4
3y−2)(3y+2)
=(3y+−2)(3y+2)
=(3y)(3y)+(3y)(2)+(−2)(3y)+(−2)(2)
=9y^2+6y−6y−4
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