Let P(x)=x3−8x2+cx−d and be a polynomial with real coefficients and with all its roots being distinct positive integers. Then number of possible value of c is ____.
We have, x1+x2+x3=8 x1x2x3=dx1x2+x2x3+x3x1=cPossible roots 1,2,5 or 1,3,4∴ d=10 or d=12⇒ c=2+10+5=17 or 3+12+4=19Hence, d=10 and c=17 or d=12 and c=19