Question

Determine whether , X = 2 is the root of the equation X^2 + X - 1 = 0​

Answer 1

Answer:

suppose x= 2

p(x) = x^2 + x - 1

p(2)= 2^2 +2 - 1

= 4+2-1

= 6-1

=5

≠ 0

therefore 2 is not a root .