Question

6. If a and B are the zeros of the quadratic polynomial f(x) = x^2 + x - 2, find the value of 1/a - 1/b​

Answer 1

Step-by-step explanation:

let alpha be a and beta be b

so a+b = -x

ab= -2

x²+x-2 =0

x²+2x-x-2=0

x(x+2) -1(x+2)=0

(x-1) (x+2)=0

x-1=0 ; x+2=0

x=1 ; x= -2

let alpha be 1 and beta be -2 so the value of

1/a - 1/b =

1/1 - 1/(-2)

-2-1/(-2)

-3/(-2)

3/2 ans

Hope this would help you

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Answer 2

Answer:

3/2 is is correct answer