Question

Помогите решить!)) пожалуйста

Answer 1

1.b) a2+10ax+25x2
  c)1+8k-8k-64k2=1-62k2
  d)16b2-20bc+20bc-25c2=16b2-25c2
   a) b2-8b+16

Answer 2

5. (9c2+d2)*(9c2+3cd-3cd-d2)=(9c2+d2)*(9c2-d2)=81c2-9c2d2+9c2d2=81c2

Answer 3

5. 81c4

Answer 4

5.(5x4-7y2)*(5x4+7y2)=25x4+35x4y2-35x4y2-49y2=25x4-49y2

Answer 5

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