Question

show that (x-√2)is a factor of 7x^2-2√8x-6

Answer 1

simply divide the given polynomial with
(x-√2) the ans will be equal to 0
hence it's the factor the polynomial


hope that my ans is helpfull

Answer 2

For this we have to put the value of x.
If after putting the value of x we get zero then it is the zero of the polynomial.
I hope that it will help you