## Intermediate Algebra (6th Edition)

The given set of values is wrong as $c=10$, not $-10$.
RECALL: The standard form of a quadratic equation is $ax^2+bx+c=0$ Write the given quadratic in equation in standard form to obtain: $x^2=-10 \\x^2+10=-10+10 \\x^2+10=0$ The quadratic equation above has: $a=1, b=0, c=10$ Thus, in the given set of values, the value of $c$ must be $10$ and not $-10$.