" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
(f(x))² = (-x+3)(-x+3) = x² - 6x + 9
2f(x) = 2(-x+3) = -2x+6
-x²+3 + x² - 6x + 9 - (-2x + 6) = -6x + 12 + 2x - 6 = -4x + 6 = 4x - 6