SOLUTION: Let {{{f(x) = 4x^2 + 11x - 3}}} A)find the roots B)factor f C)sketch f D)solve f(x)>0

Algebra ->  Equations -> SOLUTION: Let {{{f(x) = 4x^2 + 11x - 3}}} A)find the roots B)factor f C)sketch f D)solve f(x)>0       Log On


   

Question 1036510: Let f%28x%29+=+4x%5E2+%2B+11x+-+3
A)find the roots
B)factor f
C)sketch f
D)solve f(x)>0
Answer by ikleyn(52780) About Me  (Show Source):
You can put this solution on YOUR website!
.
Let f%28x%29+=+4x%5E2+%2B+11x+-+3 
A)  find the roots. x%5B1%5D = 1%2F4, x%5B2%5D = -3.   Use the quadratic formula.

B)  factor f.       f(x) = (4x-1)*(x+3)

C)  sketch f

D) solve f(x) > 0.  x < -3  and/or  x > 1%2F4.  In the interval form (-infinity,-3) U (0.25,infinity)