2. Ifà and ß be the zeros of x² + x + 1, then C² =(3
vh³+9v²)/h²
- is equal to:
Answers
Answered by
1
Step-by-step explanation:
Curved surface area of a cone , c = straight pirl
Volume of a cone , V = straight pir2h
L.H.S.= 3straight piVh3 - c2h2 + 9V2
= 3straight pih3 - (straight pirl)2h2 + 9
= straight pi2r2h4 - straight pi2r2h2l2 + 9
= straight pi2r2h4 - straight pi2r2h2(r2 + h2) + straight pi2r4h2 (Since, l2 = r2 + h2)
= straight pi2r2h4 - straight pi2r4h2 - straight pi2r2h4 + straight pi2r4h2 = 0 = R.H.S.
Similar questions