• July 17th 2011, 09:09 PM
raimel
Hii... I need help with some of this excersises...

1) Solve 3x2 + 4x = 2
2) Solve x2 + 9x + 9 = 0
3) Solve 2x2 = 14x + 20

butt the answer cannot be like x= something and x= something else... it must be likehttp://learn.flvs.net/webdav/assessm...5_03c_4_01.gif ... or i don't know... Please help because I don't know how to dp that.. :D thanks...!
• July 17th 2011, 09:12 PM
pickslides
For $\displaystyle ax^2+bx+c = 0 \implies x = \frac{-b\pm \sqrt{b^2-4ac}}{2a}$
• July 17th 2011, 09:15 PM
mr fantastic
Quote:

Originally Posted by raimel
Hii... I need help with some of this excersises...

1) Solve 3x2 + 4x = 2
2) Solve x2 + 9x + 9 = 0
3) Solve 2x2 = 14x + 20

butt the answer cannot be like x= something and x= something else... it must be likehttp://learn.flvs.net/webdav/assessm...5_03c_4_01.gif ... or i don't know... Please help because I don't know how to dp that.. :D thanks...!