Question

What is the simplest form of c^2-d^2÷d^2+cd-2c^2 where c does not equal d

Answer 1

C^2 - d^2 / d^2 + cd - 2c^2
= cd + c^2 - 2c^2 - d^2 / d^2
=  cd - c^2 - 1   (answer)