Question

ax2+bx+c=0 has equal roots then the value of b is

Answer 1

Answer:

ax²+bx+c=0 has equal roots then the value of b is

b² - 4ac = 0

b² = 4ac

b = ±√4ac

Answer 2

Answer:

±2$\sqrt{ac}$

Step-by-step explanation:

equation = ax² + bx + c = 0  

It has equal roots .  

So ,  

D = 0  

b² - 4ac = 0  

b² = 4ac  

=> b= ±2$\sqrt{ac}$