Question

If (p + 4)m2 + 1 + (8 + 1)2 = 0 has equal roots, then value of p is :​

Answer 1

Answer:

In ax

2

+bx+c=0,

Discriminant D=b

2

−4ac,

If D>0, the roots are real and distinct

In 2x

2

+px+8=0 a=2,b=p And c=8

For real roots, we have D=b

2

−4ac≥0

D=b

2

−4ac≥0⇒p

2

−4×2×8≥0⇒p

2

≥64⇒p≥±8