Jawab:
1. f(x) = 3x - (6 - x)²
f(5) = 3(5) - (6 - 5)²
= 15 - (1)²
= 15 - 1
= 14
f(3) = 3(3) - (6 - 3)²
= 9 - (3)²
= 9 - 9
= 0
f(5) + f(3) = 14 - 0 = 14
2. 9² - 21 : 3 x 5 = 81 - 21 : 3 x 5
= 81 - 7 x 5
= 81 - 35
= 46
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Jawab:
1. f(x) = 3x - (6 - x)²
f(5) = 3(5) - (6 - 5)²
= 15 - (1)²
= 15 - 1
= 14
f(3) = 3(3) - (6 - 3)²
= 9 - (3)²
= 9 - 9
= 0
f(5) + f(3) = 14 - 0 = 14
2. 9² - 21 : 3 x 5 = 81 - 21 : 3 x 5
= 81 - 7 x 5
= 81 - 35
= 46