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

In Animal Farm, the narrator _____. is only aware of what the characters are aware of is one of the characters but an unknown one is aware of the thoughts a

Write three expressions that are equivalent to 2x + 4x - 15

how is mass and liquid diifrent

How many nitrogen atoms are in the chemical formula below? C8H10(N4O2)2

SOMEONE PLZ HELP I AM IN NEED

Are points A,C and B Collinear

If the radius of a circle is 15 yards, What is the diameter?

Choose one of the animals listed on the page, and write a brief description of its characteristics. Be sure to discuss any ways the animal has adapted to its en

How did the wealthier Indians of the Pacific Northwest demonstrate their power

would a modernist author explain why the vines around a house gradually cover the entire house, blocking the doors and windows? why or why not?