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igor_vitrenko [27]
2 years ago
7

I need to know how to factor -8x^2 - x +9. I get confused when I factor out the -1. Please if you can show me it would be great!

Thanks!
Mathematics
1 answer:
jeyben [28]2 years ago
4 0
Favor out a-1 as long as you do it to the whole problem it is now equivalent then just worry about factoring the new product
-1(8x^2+X-9)
(8x+9)((X-1)
8x+9=0
Subtract 9 divide by 8
X=-9/ 8 answer
X-1=0 X=1 answer


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Parallel lines will have the same slope

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perpendiculr lines will have a negative reciprocal slope. To find the negative reciprocal, u flip the number and change the sign. So the negative reciprocal of 1/4 is -4....see how I flipped 1/4 and made it 4/1...then changed the sign making it -4/1 or just -4. That will be ur slope of the perpendicular line.

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