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= 15 - 40
= - 25
b) U5 = 2(5+1) - 3
= 12 - 3
= 9
c) U5 = 5² - 4(5) + 7
= 25 - 20 + 7
= 12
d) U5 =
= - 5
= 16 - 5
= 11
moga membantu ^_^