How to Factor

1. How to Factor (No Clicking Please)

2. Example A ( 6 ) x( - 20 ) = - 120 • Two numbers whose product is–120 and whose sum is+ 7 +15 – 8 Ready? +5 – 4 • Two numbers whose product is– 20 First one fits evenly into+15 Second one fits evenly into– 8

3. Example A ( 6 ) x( - 20 ) = - 120 • We now divide+ 15by+ 5, +15 – 8 and – 8by– 4. +5 – 4 2 3 • Solution is • (wait)

4. Example B ( 10 ) x( - 3 ) = - 30 • Two numbers whose product is– 30 and whose sum is– 13 +2 – 15 Ready? +1 – 3 • Two numbers whose product is– 3 First one fits evenly into+2 Second one fits evenly into– 15

5. Example B ( 10 ) x( - 3 ) = - 30 • We now divide+ 2by+ 1, +2 – 15 and – 15by– 3. +1 – 3 5 2 Thanks for watching the show • Solution is •