4. How would you multiply . . . (x + 3)(x + 5) 1. Distribute the first x to the x and the 5 2. Distribute the 3 to the x and the 5 FOIL http://www.freemathhelp.com/using-foil.html
5. FOIL (x + 3)(x + 5) First terms: x and x x2 Outside terms: x and 5 5x Inside terms: 3 and x 3x Last terms: 3 and 5 15 Answer: x2 + 8x + 15