Question

# Q.3 If the roots of the equation bx2 + cx+a=0 be imaginary, then for all real values of x, the expression 362x2 +6bex + 2c2 is - [AIEEE-2009) (A) Greater than 4 ab (B) Less than 4ab (C) Greater than-4ab (D) Less than-4ab

Solution

roots of button to so
is
imaginary
c²-4ab Lo
→ ->-4ab-
Bbm + 6bcx +2c=y
Coro - 463b"] [ day
366 02 2466 7470 & RER
3 - 2 2 - 4 20
cty zo
LG
G > G-4ab)