Title: Algebra Help!
soxfan#1 - November 17, 2006 01:40 AM (GMT)
10-9y-2y2
the small 2 is a squared symbol.
How can I figure out the foiling thing with the (xx+xx)(xx+xx)
there is some shortcut.
braveschopbraves - November 17, 2006 02:04 AM (GMT)
| QUOTE (soxfan#1 @ Nov 16 2006, 05:40 PM) |
10-9y-2y2
the small 2 is a squared symbol.
How can I figure out the foiling thing with the (xx+xx)(xx+xx)
there is some shortcut. |
so this?:
10-9y-2y²
rearange it to
-2y²-9y+10
you know since the equation begins with -2y² that you will have
(-2y+???)(1y+???)
then just expirement with things that multiply out to 10 and you get:
(-2y+-5)(1y+-2)
soxfan#1 - November 17, 2006 02:07 AM (GMT)
soxfan#1 - November 17, 2006 02:08 AM (GMT)
but that comes out to -2y^2+1y+10
braveschopbraves - November 17, 2006 02:09 AM (GMT)
soxfan#1 - November 17, 2006 02:12 AM (GMT)
Its working for me. That first one is prime. Thanks a lot BCB. That helped a lot.
braveschopbraves - November 17, 2006 02:14 AM (GMT)
soxfan#1 - November 17, 2006 02:21 AM (GMT)
How about this one.
x^2-xy-20y^2
^2 means squared.