*Fill in the blanks to make a quadratic whose roots are $1$ and $-1.$ *

x^2 + ___ x + ___

Since the roots are +1 and –1, the factors are (x – 1) and (x + 1)

Multiplied together gives x^{2} – 1

So, the first space contains a **0**

the second space contains a **–1**

_{.}