(y^2/7*y^0,5)/y^2=y^2/7*y^0,5*y^(-2)=y^(2/7)+0,5-2=y^(2/7)+1/2-2=y^(4+7-28)/14=
=y^(-17/14)=1/y^(17/14).
4) (11d-4n)(11d+4n)
<span>(11d-4n)(11d+4n)=121d^2-16n^2
Ответ:</span>121d^2-16n^2<span>
3)</span>(5n+5)^2-16
(5n+5)^2=25n^2=50n=25
25-16=9
Ответ:25n^2=50n=25
1-2) сама
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