" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
2. e^2 - f^2
c(c + d) - d(c + d)
c² + cd - cd - d²
c² - d²
2. (e - f) (e + f)
e(e + f) - f(e + f)
e² + ef - ef - f²
e² - f²