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x(x+15)+4(x+15)
x²+15x+4x+60
x²+19x+60
2. (2x-5)(2x+3)
2x(2x+3)-5(2x+3)
4x²+6x-10x-15
4x²-4x-15
3. (4x+3)(5x-2)
4x(5x-2)+3(5x-2)
20x²-8x+15x-6
20x²+7x-6
4. (8-5x)(9-5x)
8(9-5x)-5x(9-5x)
72-40x-45x+25x²
72-85x+25x²
maaf kalau ada yang salah
x2 + 15x + 4x +60
x2 (kuadrat) + 19x + 60
2.(2x-5) (2x+3)
4x2(2 nya pake yg kecil diatas) + 5x - 10x - 15
4x2 - 5x - 15
3. (4x + 3) (5x - 2)
20x2 - 8x + 15x -6
20x2 + 7x -6
4. (8 - 5x) (9 - 5x)
72 - 40x - 45x - 25x2
72 - 95x - 25x2