simplify. (a+b) (c-d) + (a-b) (c+d) + 2 (ad + bd)
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Step-by-step explanation:
(a+b)(c-d) + (a-b)(c+d) + 2(ab + bd)
ac - ad + bc - bd+ ac + ad -bc -bd + 2ab + 2bd
= 2ac + 2ab
= 2a( b + c)
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