## Precalculus: Mathematics for Calculus, 7th Edition

$(z+2)(z-3)$
The common denominator is $(z+2)$. Solve: $(z+2)^{2}-5(z+2)$ Take out $(z+2)$. Combine other terms: $(z+2)(z+2-5)$ Simplify: $(z+2)(z-3)$