Bonjour,
Développer et réduire les expressions:
1) 4 - (5x - 4) = 4-5x+4= -5x
2) 2 ( 3x + 5) - 4 ( x + 2) = 6x+10-4x-8= 2x+2
3) ( x +3) (x + 4) = x²+3x+4x+12= x²+7x+12
4) ( x - 1)²= x²-x-x+1= x²-2x+1
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Bonjour,
Développer et réduire les expressions:
1) 4 - (5x - 4) = 4-5x+4= -5x
2) 2 ( 3x + 5) - 4 ( x + 2) = 6x+10-4x-8= 2x+2
3) ( x +3) (x + 4) = x²+3x+4x+12= x²+7x+12
4) ( x - 1)²= x²-x-x+1= x²-2x+1
= -20x+ 16
2)= 2*3x + 2*5 (-4)*x + (-4)*2
= 6x + 10 -4x + -12
= 2x -2
3) = x*x + x*4 + 3*x + 3*4
= x au carré + 4x + 3x + 12
= x au carré + 7x + 12
4) jsp