In Problems 2330, multiply mentally. a. (2x- 3)(2x + 3) C. (m-n) b. (x4y)(x + 4y) d.
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In Problems 23–30, multiply mentally.
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a. (2x- 3)(2x + 3) C. (m-n) b. (x4y)(x + 4y) d. (2p - 3q)
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