" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
6x² - 7x² - 4y² + 2y² + 6xy + 2xy
-x² - 2y² + 8xy
= 6x²+ 7x² + 6xy - 2xy + 4y² - 2y²
= 13x² + 4xy + 2y²