" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
b) (2²-3b²)+[-(a²-2ab-b²)-2ab] = (4 - 3b²) + [-a² + 2ab + b² -2ab] = 4 - 3b² - a² + 2ab + b² -2ab = -a² - 2b² + 4