1.

Ifa, β are zeroes off(x)-x2-m(x+1 )-n , find the value of (α + l )( β+1).LLtC find the yalue of cos (A+ B).in ntea of resultin

Answer»

f(x)=x²-mx-(m+n)=0alpha+beta=malpha*beta=-(m+n)

To find,(alpha+1)(beta+1)alpha*beta+alpha+beta+1=-(m+n)+m+1=-m-n+m+1=1-n



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