Step-by-step explanation:
using 2x to multiply the second bracket I.e (2x)(3x2 +2xy+5y2)
=(6x3 +4x2y +10xy2)
using (y) to multiply the second bracket also
= (3x2y +2xy2 +5y3)
bringing the two bracket together
= 6x3 +5y3 + (10xy2 + 2xy2) +(4x2y +3x2y)
= 6x3 + 5y3 + 12xy2 + 7x2y
