" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Ingat :
(a - b)² = a² - 2ab + b²
= x² - 2 . x . 7 + 7²
= x² - 14x + 49
5a - 6b -(4a - b)
= 5a - 6b - 4a + b
= a - 5b