(у+4)(у-2)=у²-2у+4у-8=у²+2у-8
(3х-5)(2х+9)=6х²+27х-10х-45=6х²+17х-45
(m+1)(m²-m+3)=m³-m²+3m+m²-m+3=m³+2m+3
a) y^2+4y-2y-8=y2+2y-8
b)6x^2+27x-10x-45=6x2=17x-45
c)m^3-m^2+3m+m^2-m+3= m^3+3m+3
