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2. 9x pangkat 2 + 30x + 25
3. -11 + 14x
3x² + 6x × 3
2. (3x + 5)² = (3x + 5 ) (3x + 5)
3x(3x + 5) + 5(3x + 5)
9x² + 15x + 15x + 25
9x² + 30x + 25
3. 7(1 + 2x) + 9(-2 × 1)
7 + 14x - 18 + 9
7 + 9 -18 + 14x
-2 + 14x