Question

find the value of 'a'if (x-1) is a factor of x²+X+a​

Answer 1

Answer:

f(x)=x²+x+a=0

If x-1 is a factor of f(x),then x-1=0 i.e,x=1 is a root of f(x).

∴f(1)=(1)²+1+a=0

1+1+a=0

2+a=0

》a=(-2)