Question

find qaudratic equation whose roots are -1-2i​

Answer 1

Answer:

i fone root is -1-2i than another root is -1+2i

therefore, sum of roots =-1-2i+(-1)+2i

sumof roots = -2

similarly productof roots= (-1-2i)(-1+2i)=1-4i

therfore equation having roots -2 and 1-4i is

x^2-(sum of roots)x+product of roots=x^2+2x+3

Step-by-step explanation: