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

Population of a city is 36000 in 2005 by 2010 it has grown to 43800. If the city has grown linearly since 2005 and grows at the same rate what will the populati

Raphael paid $477 for a camera during a 25% off sale. What was the camera's regular price

Which of the following is not true about Galileo? A. He was such a brilliant mathematician that he became a professor of mathematics at the age of 25. B. He dev

A scientist observing a group of spider monkeys noticed that the adult females often spend time picking leaves off of tree branches. The scientist hypothesizes

what three countries were annexed by the soviet union in 1939 because of their location

what is the least dense layer of the earth

15-4t=3 how do i solve this in words

what major factor contributed to the decline of the Federalist party after the war of 1812?

Which Chinese dynasty is known for the achievements listed here? A. Ming B. Tang C. Song D. Han Accomplishments: ~improved porcelain by adding more colors

What is the cube of the quotient 24 and 6