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Ex . Expand the following using suitableidentities.a) (x + 13)(x + 20) b) (x + 30)(x + 3c) (x – 7)(x – 7) d) (x + 1)(x -1​

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HalelujahStep-by-step EXPLANATION:Usjhsjshssksgsyais7ssysue7eyjejdndt



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