Question

Express 7i^7-6i^6+3i^3-2i^2+1 in form of a+bi

Answer 1

Step-by-step explanation:

7(i^4.i^3)-6(i^4.i^2)+3i^3-2i^2+1

=7(1.-i)-6(1.-1)+3(-i)-2(-1)+1

=-7i+6-3i+2+1

=9-10i

=9+(-10)i