Question

Find the value of ‘m' if the quadratic equation 2x² + mx + 8 = 0 has equal roots.
OR​

Answer 1

Answer:

6

Step-by-step explanation:

Let a,b be roots of this equation. Then,

a+b=m

ab=8

Now (a+b)2−4ab=(a−b)2

m2−4∗8=(a−b)2

if a−b=2, then

m2−32=4

m2=36

m=±6