How to factor

How to factor 2 ax + bx + c c [email protected] (No Clicking Please) Example A 6x2 + 7x 20 (6) ( 20) = 120 F T wo numbers whose product is -120 and whose sum is +7 F T wo numbers whose product is -20 Ready? f First one ts evenly into -8 Second one ts evenly into +15

-8 -4 +1 5 +5 120 F We are done! Now we just 20 (wait) Example A 6x2 + 7x 20 (6) ( 20) = 120 F Divide 8 by 4 and +15 by +5 F Solution is

(2x + 5) (3x 4) 2 -8 -4 3 +1 5 +5 120 20 (wait) Example B 10x2 13x 3 (10) ( 3) = 30 F T wo numbers whose product is -30

and whose sum is 13 F T wo numbers whose product is -3 Ready? f First one ts evenly into -15 Second one ts evenly into +2 15 -3 +2 30 +1 F We are done! Now we just -3 (wait) Example B 10x2 13x 3

(10) ( 3) = 30 F Divide 15 by 3 and +2 by +1 F Solution is (5x + 1) (2x 3) 5 2 15 -3 +2 30 +1 -3 (wait)

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