Question

if b is equal to zero and C is less than 0 in X square + bx + c is equal to zero then find the value of x? ​

Answer 1

Answer:

if b=0

then x^2+c=0(where c is less than 0)

x^2=c

X=√c

Answer 2

Answer:

Correct option is

B

b

2

−4ac<0

Consider the equation,

ax

2

+bx+c

Now if b

2

−4ac<0, then it does not have any real roots and hence it will not intersect the x axis at any point.

If a>0 then y=ax

2

+bx+c will lie completely above x axis and

If a<0 then y=ax

2

+bx+c will lie completely below x axis.

It is given that the above equation is always greater than zero,

Or

ax

2

+bx+c>0 for ϵR.

This can only occur is

b

2

−4ac<0 and a>0.