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LELE233
Answered

bonjours
développements
A=-9(2x-5) D=3x(1x-4)-2(2-5)
B=2x(-3x+1)
C=2y(1-4y)-5(3y-4)
merci et a faire en plusieurs ligne svp distributivité

Sagot :

bonsoir,

A=-9(2x-5)

= -18x +45

D=3x(1x-4)-2(2-5)

=3x²-12x  -4 +10

= 3x² -12x +6

B=2x(-3x+1)

=   -6x² +2x

C=2y(1-4y)-5(3y-4)

=2y -8y² -15y +20

= -8y² -13y +20
A = -9 * 2x + (-9)* (-5)
A = -18x + 45

B = 2 * 1 * (-3x) + 1 * 1
B = -6x - 1

C = 2y * 1 * (-3x) + 1 * 1
C = -6yx + 1

D = 3 * 1 * 1x + 1 * (-4) -2 * 2 + (-2) * (-5)
D= -18x + 45

Voilà

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