A = 5 x au carré + 8 - 4 x + 4 - 3 x au carré + 2 x B = 8 x - 9 x au carré - 12x + 8 + 5x au carré - 4 x + 7 C = x au carré - 5x + 2 + (4x au carré +2x -7) D = (-9x au carré - 5 + 3x) - (4x au carré + 7x - 3)
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mohayati2006
A = 5 x²+ 8 - 4 x + 4 - 3 x² + 2 x =2x²-2x+8+4 =2x²-2x+12 =2(x²-x+6)
B = 8 x - 9 x² - 12x + 8 + 5x² - 4 x + 7 =8X-12X-4X-9X²+5X²+8+7 =-8X-4X²+15 =-4X²-8X+15
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=2x²-2x+8+4
=2x²-2x+12
=2(x²-x+6)
B = 8 x - 9 x² - 12x + 8 + 5x² - 4 x + 7
=8X-12X-4X-9X²+5X²+8+7
=-8X-4X²+15
=-4X²-8X+15
C = x²- 5x + 2 + (4x² +2x -7)
=X²-5X+4X²+2X-7+2
=5X²-3X-5
D = (-9x²- 5 + 3x) - (4x² + 7x - 3)
=-9X²-5+3X-4X²-7X+3
=-13X²-4X-2