Answered

Bonsoir , pouvez vous develloper ses 5 expressions ? svp 

1)25×^2-16-(-2×-3)(5×+4)

2)-(×-2)(-10×+7)-(-×+9)(-10×+7)

3)-(-8×-4)-(9×-7)(-8×-4)

4)-(2×+5)(4×-3)-(2×+5)(×+7)

5)(-2×+8)(×-2)+64-32×+4×^2

Sagot :

WINNER123
Bonsoir
1)25×^2-16-(-2×-3)(5×+4)  (je comprends que c'est 25²)
 625 - 16 - ( -10x² -8x -15 -12)
625 -16 +10x² +8x +15 +12
10x² +8x +636

 2)-(×-2)(-10×+7)-(-×+9)(-10×+7)
- (-10x +7x +20 -14) - (10x -7x -90 +63)
10x -7x -20 +14 -10x +7x +90 -63
= 21

 3)-(-8×-4)-(9×-7)(-8×-4)
- ( -8x -4) - ( -72x² -36x +56x +28)
8x +4 +72x² +36x -56x -28
= 72x² +12x -24

 4)-(2×+5)(4×-3)-(2×+5)(×+7)
- (8x² -6x +20x -15) - (2x² +14x +5x +35)
-8x² +6x -20x +15 -2x² -14x -5x -35
-10x² -33x - 20

5)(-2×+8)(×-2)+64-32×+4×^2
(-2x² +4x +8x -16) + 64 -32x + 4x²
-2x² + 12x -16 +64 - 32x +4x²
= 2x² -20x +48