Question

Value of p for which 4x² + px + 1= 0 has equal roots​

Answer 1

Answer:

p=4

explanation:

We know, for equal roots

$b {}^{2} - 4ac = 0$

now here ,b=p , a=4 and c=1

Using above formula

$p {}^{2} - 4 \times 4 \times 1 = 0 \ \\ p {}^{2} - 16 = 0\\p {}^{2} = 16 \\ p = \sqrt{16 } \\ p = 4$