Question

find the value of b²-4ac for the quadratic equation x²+10x+2 =0​

Answer 1

Answer:

Step-by-step explanation:

ax  

2

+bx+c=0

For roots, D≡b  

2

−4ac

and given that b  

2

−4ac=0

⇒D=0

SO, equation will have only one root as,

x=  

2(a)

−b±  

b  

2

−4ac

​

 

​

 

x=  

2a

−b±0

​

 

x=  

2a

−b

​

 Only one real root.

Answer 2

Step-by-step explanation:

b=10

a=1

c=2

b²-4ac=100-4*1*2=100-8=92