Seudónimo Seudónimo

01-03-2016
Mathematics

contestada

If f(x) = x^3-2x^2 which expression is equivalent to f(i)

Respuesta :

apologiabiology apologiabiology

01-03-2016

remember that
i^2=-1 so

f(i)=i^3-2i^2
i^3=i^2 times i=-1 times i=-i

2i^2=2(i^2)=2(-1)=-2

f(i)=-i-(-2)
f(i)=-i+2

answer is -i+2 or 2-i

Answer Link

Otras preguntas

(3m-2)(3m 2) determine each product

Determine the position of a given value. -3,-8,-13,..........,-58 ( what position is -58, in other words )

At the beginning of the mission, since our priority was to identify the origin of the alien’s signal. What is the most accurate way to describe the excerpt? It

where is augsberg on the map

Why does an ion have an electrical charge?

Suppose that you want to find the equation for a line that passes through the two points (0,3) and (4,9). What is the slope of this line?

if you roll a 6 you receive a gold medal, if you roll a 4 or 5 you receive a silver, if you roll a 1, 2 or 3 you receive a bronze, given the above what are the

What is a tool that shows the relationship between distances on a map and actual distances

find the volume of a storage room that is 8 feet long, 6 feet wide, and 10 feet high. the room is in the shape of a rectangular solid.

using the given zero, find all other zeros of f(x). -2i is a zero of f(x) = x^4 - 45x^2 - 196