Chapter 4 Quadratic Functions and Factoring - 4.3 Solve x(squared) + bx + c = 0 - Guided Practice for Example 2 - Page 253: 5

$$(q-10)(q+10)$$

Since the coefficient of the squared term is one, we know that the expression must factor to: $$ (q\pm a)(q\pm b)$$ Here, we see that a and b must multiply to get $-100$ and add to get $0$. Thus, we find that the solution is: $$(q-10)(q+10)$$