" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
9(x²-4)+4(x²+5)
9x² - 36 + 4x² + 20
13x² - 16
^_^
cherry
= 9x² - 36 + 4x² + 20
= 13x² - 16