If the roots of ax2 + bx + c = 0  are –1, –2  then a:b:c=

Given equation is ax2 + bx + c = 0  The roots of given equation are –1, –2  ∴x=−1,−2 ⇒ax2+bx+c=(x+1)(x+2)                               =x2+3x+2 Comparing the coefficients,  we geta:b:c=1:3:2