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2. 10y²-6
3. 2x²+7x-15
4. 8x³+24x²+24x+8
1) 3^2 - 2x + 4 + x^2 + 4x -3
= 4x^2 -2x + 1
2) 10y^2 - 6 (tinggal dikalikan angka 2 kedalam yang dikurung)
3) (kali silang)
2x^2 + 10x - 3x - 15
= 2x^2 + 7x - 15
4) aku lupa rumusnya maaf ya