Sagot :
a=(9x-4)(-2x+1)
a=-18x²+9x+8x-4
a=-18x²+17x-4
b= 15x-(2x+5)²
b=15x-(4x²+20x+25)
b=15x-4x²-20x-25
b=-4x²-5x-25
a=-18x²+9x+8x-4
a=-18x²+17x-4
b= 15x-(2x+5)²
b=15x-(4x²+20x+25)
b=15x-4x²-20x-25
b=-4x²-5x-25
Bonjour
a=(9x-4)(-2x+1)
a = -18x² +9x +8x -4
a = -18x² +17x -4
b= 15x-(2x+5)²
b = 15x - (4x² +20x +25)
b = 15x - 4x² -20x -25
b = -4x² -5x -25
a=(9x-4)(-2x+1)
a = -18x² +9x +8x -4
a = -18x² +17x -4
b= 15x-(2x+5)²
b = 15x - (4x² +20x +25)
b = 15x - 4x² -20x -25
b = -4x² -5x -25