а) (у+4)(у-2)= y^2-2y+4y-8= y^2+2y-8
б) (3х-5)(2х+9)= 6x^2+27x-10x-45= 6x^2+17x-45
в) (м+1)(м^2-м+1)= м^3+ 1
(m+1) (m^2-m+3)= m^3-m^2+3m+m^2-m+3= m^3+2m+3
а) (у+4)(у-2)= y^2-2y+4y-8= y^2+2y-8
б) (3х-5)(2х+9)= 6x^2+27x-10x-45= 6x^2+17x-45
в) (м+1)(м^2-м+1)= м^3+ 1
(m+1) (m^2-m+3)= m^3-m^2+3m+m^2-m+3= m^3+2m+3