Question

3. If the quadratic equation 2x2 + 2x + p = 0 has equal roots then value of p is:
(a)1/3
(b)1/2
(c) 0 (d) 2
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Answer 1

Answer:1/2(b)

Step-by-step explanation:

discriminant d = b^2-4ac

comparing it with ax^2 +bx+c=0

we get

a=2 b=2 c=p

for equal roots d=0

b^2-4ac=0

2^2-4*2*p=0

=>4-8p=0

=>8p=4

=>p=2/8 = 1/2