Question

find the roots of the polynomial equation 2x^3+2x^2-19x+20=0

Answer 1

-4

Answer 2

what are also the real and complex numbers

Answer 3

http://www.mathsisfun.com/numbers/real-numbers.html

Answer 4

but what are they for this equation

Answer 5

the roots are as follow, x= -4, x = (6+\[\sqrt{-4}\])/4, x = (6-\[\sqrt{-4}\])/4

Answer 6

as you cant take sq root of minus thereofre we instead of sqrt of -4 will be written as 2i where i is sqrt of -1

Answer 7

you can write the roots x = -4, x=( 6+2i)/4, x=( 6-2i)/4

Answer 8

the first root is a real number whereas the other two are complex