Question

HELP ASAP...METAL!!!!!!!!!! @jordanloveangel @tkhunny @perl @bohotness

Answer 1

Find the quadratic equation with roots -1+ 4i and -1 - 4i @wetloaf

Answer 2

1 sec

Answer 3

I know you do something with ( ) then set it equal to zero but the i's are getting me confused

Answer 4

If a is a root of a quadratic equation, that means that (x-a) is a factor of the equation. Thus, (4+i) being a root means that (x-(4+i)) is a factor. Similarly, that means that (x-(4-i)) is a factor. Thus, the equation is http://formula.algebra.com/cgi-bin/plot-formula.mpl?expression=y=%28x-%284%2Bi%29%29%28x-%284-i%29%29&x=0003
So, we need to multiply out the right hand side in order to determine the equation.

Answer 5

is this right?

Answer 6

1) http://formula.algebra.com/cgi-bin/plot-formula.mpl?expression=y=x%5E2-%284-i%29x-%284%2Bi%29x%2B%284%2Bi%29%284-i%29&x=0003

2) http://formula.algebra.com/cgi-bin/plot-formula.mpl?expression=y=x%5E2-4x%2Bix-4x-ix%2B16-4i%2B4i-i%5E2&x=0003

3) http://formula.algebra.com/cgi-bin/plot-formula.mpl?expression=y=x%5E2-8x%2B16%2B1&x=0003

4) http://formula.algebra.com/cgi-bin/plot-formula.mpl?expression=y=x%5E2-8x%2B17&x=0003

Answer 7

from 2 to 3 how did you get rid of the i ?

Answer 8

@jordanloveangel ^?

Answer 9

http://www.algebra.com/algebra/homework/Quadratic_Equations.faq.question.176376.html @Catlover5925