determine two consecutive multiples of 3whose product is 270

As the 2 nos. are consecutive multiples of 3,they are x and (x+3).

x(x+3)=270

x^2+3x-270=0

x^2-15x+18x-270=0

(x+18)(x-15)=0

x=15 or x=-18

Therefore the 2 consecutive multiples of 3 are 15 and 18 or -15 and -18.