Saved Bookmarks
| 1. |
Find k value if 9xsquare+kx+1=0 |
|
Answer» Step-by-step explanation: The given EQUATION if 9x2+kx+1=0 comparing with ax2+bx+c=0 here a=9, b=k , c=1 △ = b2−4ac = k2−4(9)(1) = k2−36 The ROOTS are equal so △ MUST be zero ∴ = k2−36=0 = (x+6)(x−6)=0 =x+6=0 or x−6=0 ∴ k=−6 or k=6 |
|