You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
Factor 7x^2(x+1) -x(x+1) +6(x+1)
- Thread starter mrolive
- Start date
D
Deleted member 4993
Guest
Not sure how to do this one. Tried simplifying and then factoring by grouping but that doesn't work out (If I did it correctly)
[h=2]Factor 7x^2(x+1) -x(x+1) +6(x+1)[/h]
Factor out (x+1) first - what do you get?
Factor 7x^2(x+1) -x(x+1) +6(x+1)
Factor out (x+1) first - what do you get?
**** don't know how I missed that. Thanks a bunch!
Factor 7x^2(x+1) -x(x+1) +6(x+1)
after division by (x + 1):
7x^2 - x + 6
That +6 should DEFINITELY be -6; typo?
I'm not sure. 7x^2(x+1) -x(x+1) +6(x+1) is how it is written in the textbook.
D
Deleted member 4993
Guest
Factor 7x^2(x+1) -x(x+1) +6(x+1)
after division by (x + 1):
7x^2 - x + 6
That +6 should DEFINITELY be -6; typo?
Why??!!
D
Deleted member 4993
Guest
Because 7x^2 - x - 6 = (7x + 6)(x - 1)
7x^2 - x + 6 has negative discriminant;
unless that's on purpose by a mean teacher!
It could also be 7x^2 - 13x + 6 = (7x - 6)(x - 1)
But nobody said that all the factors are linear functions of 'x'.