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B = (x – 3) (5x + 7) – (2 – x) (6 – x)
C = (2x – 5) (x – 4) – (x – 4) (3x + 7)
B = (x – 3) (5x + 7) – (2 – x) (6 – x)
C = (2x – 5) (x – 4) – (x – 4) (3x + 7)
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B= (x – 3) (5x + 7) – (2 – x) (6 – x)
B= 5x² +7x -15x -21 - (12 -2x -6x + x²)
B= 5x² -8x -21 - 12 + 2x +6x - x²
B= 4x²-33
C= (2x – 5) (x – 4) – (x – 4) (3x + 7)
C= 2x² -8x -5x +20 - (3x² +7x - 12x - 28)
C= 2x² -13x +20 -3x² -7x +12x +28
C= -x² -8x + 48
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