Question

Binomio por binomio: (y+2) (2x+1)
(x+1) (xy+y)
(2x-5) (y+4)
(xy+3) (x-y)

Answer 1

(y+2)*(2x+1)= 2xy+y+4x+2
(x+1)*(xy+y)= yx^2+yx+y
(2x-5)*(y+4)= 2yx+8x-5y-20
(xy+3)*(x-y)= yx^2-xy^2+3x-3y