Disc. of 2x2– 7x+1=0 is…………….
a)41
b) 40
c) 47
d)51
Solution:2x2-7x+1=0
b2-4ac
Disc. Of x2-3x+3=0 is…………………
a) 21
b) 12
c)-3
d)6
Solution:x2-3x+3=0
b2– 4ac
The roots of x2+8x+16=0
a)imaginary
b)equal
c)Unequal
d)Irrational
If roots of quadratic
equations are imaginary, then discriminant is:
a)negative
b)positive
c)zero
d)irrational
Solution:If Discriminant is negative then the roots are imaginary and unequal
