JalenForeman9376 JalenForeman9376

16-06-2017
Mathematics

contestada

What are the roots of the equation x^2-4x+13=0?

Respuesta :

ghanami ghanami

18-06-2017

hello :
x² -4x +13 = 0
(x²-2(2)(x) +2²) -2² +13 = 0
(x-2)² +9 = 0
in : R no solution reals
in:C two solutions :
x-2 =3i or x-2 = -3i
x =2+3i or x = 2-3i because : - 9 = 9i² = (3i)²..... i² = -1

Answer Link

Otras preguntas

help meeeeeeeeeeee pleaseeeeeeeeeee rn rnnnnnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! help meeeeeeeeeeee pleaseeeeeeeeeee rn rnnnnnnnnn!!!!!!!!!!!!!!!

A Wind power has been beneficial to ranchers, farmers, and rural homeowners for decades. Windmills and turbines use wind power to change the wind's kinetic ener

help pls stats......

Which statement is logically equivalent to the following conditional statement? "If it has exactly four sides, then it is not a hexagon." If it does not have e

".... When the British Parliament asserted it's right to tax and govern the colonies... Ideals clashed". What were the ideals and how was the clash resolved?

Function g can be thought of as a translated (shifted) version of f(x) = x^2 write the equation for g(x) Please help image below

Find the equation of the line shown.

Does Asoka believe he should be forgiven for the conquering of Kalinga?

Bonjour quelqu’un peut m’aider pour ce devoir en espagnol svp

you have been punished unfairly by your class teacher for not doing something right a letter to your head explainingwhy you think you have been treated unfairly