Question

Find the LCM of 21y^2) + 42y and 3y^2 + 9y + 6

Answer 1

21y^2 + 42y = 21y(y + 2)
3y^2 + 9y + 6 = 3*(y + 1)(y + 2)

LCM = 21y(y + 2)*3*(y+1)(y+2)/[3*(y + 2)]
= 21y*(y+1)(y+2)

Ans. 21y*(y+1)(y+2)