3 years ago

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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