Mathematics, 25.01.2021 23:10 brookcoyanpeus5y

Expand and simplify the following expressions : 1.(a-5)(a-7) 2.(x-2y)(3x+4)
3.(4x+3y)(4x-3y)
4.(6x-7y)(6x+7y)

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Expand and simplify the following expressions : 1.(a-5)(a-7) 2.(x-2y)(3x+4)
3.(4x+3y)(4x-3y)

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