Expert: Lynn Houston - 11/8/2009

Question
12. Simplify: 2a^2 = 7a+4  
a. a = 0.5 or -4                b. a = -0.5 or 4
c. a = 0.5 or 4                 d. a = 2 or -4

13. Simplify: (n-1)^2 = 1
a. n = -2 or 0                  b. n = 0 or -1
c. n = 2 or 1                   d. n = 0 or 2

14. Simplify: m^2 = m
a. m = 0 or -1                  b. m = -1 or -2
c. m = 1 or -1                  d. m = 0 or 1

15. Solve: 4(3d-5) = 2(5d+1)
a. d = 11                        b. d = 20
c. d = 10                        d.d = 22

4.Simpilfy (t + 1) (t^2 - 1)/ (t - 1) (t + 1)^2
1. Simplfy: z^3 - 4z/z^2 - 4z + 4
Please help me, I do my own homework, but i just keep getting these wrong.  

Answer
12. Simplify: 2a^2 = 7a+4  
b. a = -0.5 or 4


13. Simplify: (n-1)^2 = 1
d. n = 0 or 2

14. Simplify: m^2 = m
d. m = 0 or 1

15. Solve: 4(3d-5) = 2(5d+1)
a. d = 11

4.Simpilfy (t + 1) (t^2 - 1)/ (t - 1) (t + 1)^2
(t + 1)(t - 1)(t + 1)/(t - 1)(t + 1)(t + 1)
that all reduced to 1


1. Simplfy: z^3 - 4z/z^2 - 4z + 4
z(z^2 - 4)/(z - 2)(z-2)
z(z - 2)(z+2)/(z - 2)(z-2)
z(z+2)/(z-2)

Let me know if you need any of the steps written out