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2. -x + 8
3. 11x - 5y - 3
4. -5x + 7y - 3
5. 18 + 8x - 8y
6. -2 - 4x + 2y
= 6xkuadrat-10x+9x-15
= 6x kuadrat -x-15 (catatan kuadrat itu ditulis 2 kecil diatas x sebelah kanan)
2. (2x+3)-(3x-5)
= 6x kuadrat -10 x-9x-15
= 6x kuadrat -19x-15