" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
f (a+3) = (a+3)^2 - 4a+ 12
= a^2 + 6a + 9 - 4a + 12
= a^2 +2a +21
= + 6a - 4a + 9 - 12
= + 2a - 3