Question

the difference of the roots of the quadratic equation ax2+bx+c=0 is 4 then b2-4ac=______
a.2a
b.16à^2
c.4a^2
d.4a
plzz...answer my question fast

Answer 1

Answer is option b..

Answer 2

Answer:

Use formulae for difference of roots,

D²a²=b²-4ac

Here, D=Difference of roots

D=4

b²-4ac=(4)²a²

or b²-4ac=16a²

Option b. is correct