10 баллов! Д) y(7-2y)-(3-y)^2 E) 3(z+2)^2-z(z-3) Ж)2t(3t-5)-(3t-2)^2 З) k(5k+4)^2-3k^2(k+7) Спасибо!. Created by AlbertLotsan. matematika-ru

10 баллов! Д) y(7-2y)-(3-y)^2 E) 3(z+2)^2-z(z-3) Ж)2t(3t-5)-(3t-2)^2 З) k(5k+4)^...

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10 баллов!
Д) y(7-2y)-(3-y)^2
E) 3(z+2)^2-z(z-3)
Ж)2t(3t-5)-(3t-2)^2
З) k(5k+4)^2-3k^2(k+7)
Спасибо!

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Посяша Д)7y-2y^2-9+6y-y^2=-3y^2+13y-9
E)3(z^2+4z+4)-z(z-3)=3z^2+12z+12-z^2+3z=2z^2+15z+12
Ж)6t^2-10t-9t^2+12t-4=-3t^2+2t-4
З)25k^3+40k^2+16k-3k^3-21k^2=22k^3+19k^2+16k

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