!!!!! ПОМОГИТЕ!!!!!!!!

Question

!!!!! ПОМОГИТЕ!!!!!!!!

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Answer 1

64-а²= (8-а)(8+а)
36-12 х+х²= (6-х)²
27+у³=(3+у)(9-3 у +у²)
2х²+ 28х +98=2(х²+14+49)=2(х+7)²