Question

What are the possible number of positive, negative, and complex zeros of f(x) = –2x3 + 5x2 + 6x – 4 ?

A:Positive: 2 or 0; Negative: 1; Complex: 2 or 1

B:Positive: 1; Negative: 2 or 0; Complex 2 or 0

C:Positive: 2 or 0; Negative: 1; Complex: 2 or 0

D:Positive: 1; Negative: 2 or 0; Complex: 0

This one has me stumped. I'm leaning towards A, but I'm not sure. Help?

Answer 1

Anyone?

Answer 2

By inspection i just found out that 1/2 is a root of given equation , Now u can do division to reduce the complexity & get a quadratic equation

Answer 3

Couuld you help walk me through the steps? Sorry, I'm really lousy with math...

Answer 4

*Could

Answer 5

Let me solve it first . Wait 4 a while

Answer 6

Alright, thank you.

Answer 7

@karakuri Hi Please find the attached file. If u find something that needs explaination let me know :)

Answer 8

Thanks a whole lot! I'll print this out and put it in my notes to review. c: Thanks for answering. <3

Answer 9

My pleasure :)