Question

Find the value of b...... And send me a full explanation please​

Answer 1

Answer:

see in the attachment.

Step-by-step explanation:

Roots are equal

so, From Discriminanat we get.

Answer 2

Answer:

Answer is ±2√ac

Let f(x) = ax² + bx + c

• If it has equal roots then D = 0

=> b² - 4 × a × c = 0

=> b² = 4ac

=> b = ±√4ac = ±2√ac //