Question

approximate to two decimal places, find the x-intercepts, local maximum and local minimum: p(x)=x^3+2x^2-3x-4

Answer 1

derivative it :) for the max and min

Answer 2

3x^2 +4x -3 = 0 is possible max or min

Answer 3

-4/6 +- sqrt(16 -4(-3)(3))/6

Answer 4

(-2 +- sqrt(5))/3 = max min possibilities

Answer 5

i know how to get the max/min. Im having problems with finding the x-int. This assignment is going to close in a minute so im trying my hardest to find the answer.

Answer 6

quickest way is prolly input it into wolframs graphing calcultor

Answer 7

That website is confusing to me. I dont know which is which.

Answer 8

http://www.wolframalpha.com/input/?i=plot+e^(-0.2x)*sin(x)+from+x%3D0+to+10

Answer 9

the roots are approx. -1, -2.561 and 1.561

Answer 10

the min: .535

the max: -1.868

Answer 11

thanks alot.