Question

Determine whether thegiven value of x is a solution of the given equation or not:x2 x 1 =0:x=-1

Answer 1

x2 +  x + 1 = 0  

Let x = -1 ⇒ (-1)2 + (-1) + 1 = 1 - 1 + 1 = 1.

Therefore the given value of x is not a solution of the given equation.