Final Answer
Step-by-step Solution
Specify the solving method
The discriminant (D) of a quadratic polynomial of the form $ax^2+bx+c$ is calculated using the following formula, where $a$, $b$ and $c$ are the coefficients of the corresponding terms
From the equation, we see that $a=1$, $b=-1$ and $c=1$. Replacing the values of $a$, $b$ and $c$ in the previous formula, we obtain
Multiply $4$ times $1$
Multiply $4$ times $-1$
Calculate the power ${\left(-1\right)}^2$
Subtract the values $1$ and $-4$
The discriminant of the polynomial results in