Question

if alpha and beta are the zeros of polynomial 3 X square + 5 x + 7 then find the value of 1 byalpha + 1 by beta

Answer 1

 
this is example for u:
Let alpha and beta be the zeroes of p(x)=4x2+3x+7

Now, In Polynomial,

a=4, b=3 and c=7

Now,

alpha+beta= -b/a= -3/4

alpha*beta= c/a=7/4

Now, According to question,

alpha-1+beta-1

= (1/apha)+(1/beta)

= alpha+beta/alpha*beta --(By taking alpha*beta as LCM)

= (-3/4)/(7/4)

= -3/7

Required Answer--> -3/7 

Hope It helps!