Question

roots of ( b x^{2}+c x+a=0 ) is imaginaty

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

Solution