find the product by using identity (x+3)(x-3)
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Using
(a+b)(a-b)=a^2-b^2
(x+3)(x-3)=x^2-3^2=x^2-9.
(a+b)(a-b)=a^2-b^2
(x+3)(x-3)=x^2-3^2=x^2-9.
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hope helped..........
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