Princezz3286
Junior Member
- Joined
- Nov 12, 2005
- Messages
- 66
66) (z + 2)^2 = -z (3z + 4) + 9
(z + 2) (z + 2) = -z (3z + 4) + 9
(z + 2) (z + 2) = (-3z^2 - 4z + 9) * -1
(z + 2) (z + 2) = 3z^2 + 4z - 9
above is my work process, but this is where I am stuck because I can't factor 3z^2 + 4z - 9.... please let me know where to go from here.
70) 15t^3 + 40t = 70t^2
-70t^2 = -70t^2
------------------------------------
15t^3 - 70t^2 + 40t = 0
5t(3t^2 - 14t + 8) = 0
5t[(3t - 2)(t - 4)]= 0
where do I go from here? I don't get it?
HELP
Thank You!
Heather
(z + 2) (z + 2) = -z (3z + 4) + 9
(z + 2) (z + 2) = (-3z^2 - 4z + 9) * -1
(z + 2) (z + 2) = 3z^2 + 4z - 9
above is my work process, but this is where I am stuck because I can't factor 3z^2 + 4z - 9.... please let me know where to go from here.
70) 15t^3 + 40t = 70t^2
-70t^2 = -70t^2
------------------------------------
15t^3 - 70t^2 + 40t = 0
5t(3t^2 - 14t + 8) = 0
5t[(3t - 2)(t - 4)]= 0
where do I go from here? I don't get it?
HELP
Thank You!
Heather