Question

The roots of 2x2-bx+8 =0 are emaginary it?​

Answer 1

Answer:

d<0

b2-4ac<0

b2-4*2*8<0

b2-64<0

b2<64

Answer 2

Answer:

The roots of the given quadratic equation are imaginary if,

Either, the value of b <8 or, b<-8

Step-by-step explanation:

Given that,

2x2-bx+8 =0 - - - - - - - (I)

The roots of the quadratic equation (I) are imaginary if,

(-b) ^2-4*2*8 < 0

Or, b^2-64<0

Either the value of b <8 or, b<-8