Question

 If a and b are the zeros of the quadratic polynomial f(x)=x^2+4, then what is the value 1/a+1/b-ab​

Answer 1

Answer:

Step-by-step explanation:

f(x)=x  

2

−x−4

α+β=1

αβ=−4

→  

α

1

​

+  

β

1

​

−αβ

=  

αβ

α+β

​

−αβ

=  

−4

1

​

−(−4)

=  

4

−1

​

+4

=  

4

15

​

Answer 2

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