" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
b = 2 - √7
maka
a + b = (2 + √7) + (2 - √7) = 2 + √7 + 2 -√7 = 4
a - b = (2 + √7) - (2 - √7) = 2 + √7 - 2 + √7 = 1√7 + 1√7 = 2√7
Jadi
a+b / a-b
= 4 / 2√7
= 2 / √7 ----> dirasionalkan
= 2/√7 x √7/√7
= 2√7 / 7
= 2/7 √7
Semoga membantu... ^_^