Factorise 19)40+3x-x^2
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Answer:
40+ 3x - x²
-x² + 3x + 40
-x² + (8 - 5)x + 40
-x² + 8x - 5x +40
-x(x - 8) - 5(x -8)
(-x -5) (x -8)
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