imaginary numbers
Find the reciprocal of 2-7i and express it in terms of a+bi
I need help
please and thank you
reciprocal of 2-7i is
1/(2-7i)
multiply by (2+7i)/(2+7i)
1/(2-7i)*(2+7i)/(2+7i)
= (2+7i)/(4 - 49i^2)
= (2+7i)/53
= 2/53 + 7i/53