Bentuk sederhana dari (x + 5) per -9 + x - 3 (per) x + 3
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-9 x+3
= (x+5)(x+3) (x-3)(-9) = x²+3x+5x+15 -9x+27
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(-9)(x+3) (x+3)(-9) (-9)(x+3) (x+3)(-9)
= x²+8x+15-9x+27 = x²-x+42
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(-9)(x+3) (-9)(x+3)