Question

SAMPLE Paper 8
Tume Allowed: 3 hrs.]
Max Marks 90
Section A
without determining the roots, comment upon the nature of the roots of the following quadratic equation
7- 6x + 70
​

Answer 1

use discriminant formula...

here a=0 b=-6 and c =70

d=b²-4ac

d=(-6) ²-4(77)

d=36-308

d=-274..

mujhe lagta hai 7x²-6x+70 hoga equation where a=7 b=-6 and c=70...

• using d=b²-4ac
• d=(-6) ²-4(7)(70)
• d=36-1960
• d=-1924

since in both cases d is less than 0 so no real roots..