Sagot :
3x2x+3x13
=6x+39
B=4xx3+4xx(-5x)
=12x-20x
=-8x
C=2xx3x+2xx(-2)
=6xaucarré -4x
D=-7xx2x-7xx-4
=14xaucarré +28x
=6x+39
B=4xx3+4xx(-5x)
=12x-20x
=-8x
C=2xx3x+2xx(-2)
=6xaucarré -4x
D=-7xx2x-7xx-4
=14xaucarré +28x
A = 3×2x+3×13
A = 6x+39
B = 4x×3+4x×(-5x)
B = 12x+(-20x²)
C = 2x×3x+2x×(-2)
C = 6x²+(-2x)
D = -7x×2x+(-7x)×(-4)
D = -14x²+28x