Question

помогите со 162 пожалуйста

Answer 1

formula
(a+b)^2=a^2+2ab+b^2
(a-b)^2=a^2-2ab+b^2

Answer 2

а решение

Answer 3

1.(m+5)^2 -(m-5)^2
(m+5-m+5)(m+5+m-5)=20m
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2.(x+y)^2 -(x-y)^2
(x+y-x+y)(x+y+x-y)=2y*2x=4xy
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3.(x-6)^2 -9x^2
  (x-6-3x)(x-6+3x)=-(6+2x)(2x-6)