Ответ:
28.6. a)64x^2+48xy+9y^2
б)36m^2-48mn+16n^2
в) 81p^2-36pq+4q^2
г) 100z^2+60zt+9t^2
28.7 a)9a-15ax+25x^2
б)36y^2+12yz+4z^2
в)?
г) (144z^2+72zt+9t^2)=144z^2-72zt+9t^2
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Ответ:
28.6. a)64x^2+48xy+9y^2
б)36m^2-48mn+16n^2
в) 81p^2-36pq+4q^2
г) 100z^2+60zt+9t^2
28.7 a)9a-15ax+25x^2
б)36y^2+12yz+4z^2
в)?
г) (144z^2+72zt+9t^2)=144z^2-72zt+9t^2