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belka [17]
3 years ago
8

1.) (X+9)(x+3)

Mathematics
1 answer:
hodyreva [135]3 years ago
5 0
(x+9)(x+3)=x^2+3x+9x+27=x^2+12x+27\\\\
(y-5)(y^2-2y+6)=y^3-2y^2+6y-5y^2+10y-30=\\
=y^3-7y^2+16y-30
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