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25+5-9
21
2. 2.(-3)²-1
2.9-1
17
3. (2)²-3.2+5
4-6+5
3
gini bkn?
maka
5²+5-9 = 25+5-9
=21
2. X = -3. 2x²-1
maka
2. (-3)²-1 = 2 × 9-1
= 18-1=17