FACTORING...why does 5x^2-x-6 = (5x-6) (x+1) shouldnt the -6 +1 equal -1....???

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2007-01-16 05:55:19 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

no, because you must remember there is a coefficient in front of the x^2, you can use what you are saying if you do this 5(x^2-1/5x-6/5)

2007-01-16 05:59:08 · answer #1 · answered by Zidane 3 · 0⤊ 0⤋

The -6 and the +1 do not get added, they get multiplied together.

2007-01-16 13:58:38 · answer #2 · answered by woodysbeard 2 · 0⤊ 0⤋

It's not -6x + 1x, it's -6x + 5x.
(5x-6) (x+1) = 5x^2 + 5x - 6x - 6

2007-01-16 14:17:57 · answer #3 · answered by Helmut 7 · 0⤊ 0⤋

(5x^2+5x)+(-6x-6)
5x(x+1)-6(x+1)
(5x-6)(x+1)
x= 6/5 and -1

2007-01-16 14:00:10 · answer #4 · answered by 7 · 0⤊ 1⤋

no they multiply not add

2007-01-16 14:02:37 · answer #5 · answered by KateMcKenzie. 2 · 0⤊ 0⤋