Sagot :
Réponse :
*(3 - 2x)(y - 2) = 3y - 6 - 2xy + 4x
*(2b - 5)(a - 7) = 2ab - 14b - 5a + 35
*7(x - 3)2x = 14x² - 42x
*(8x² - 2)(7x - 3) = 56x^3 - 24x² - 14x + 6
*(3/2a - 6)(3b - 1/2) = 9/2ab - 3/4a - 18b + 6/2 = 9/2ab - 3/4a - 18b + 3
*(-4 - 11)(3y + 14) = (-15)(3y + 14) = -45y - 210
Explications étape par étape
bonsoir,
(3-2x)(y-2)= 3y -6 -2xy +4 = 3y -2xy -2
(2b-5)(a-7) = 2ab -14b -5a +35
7(x-3)2x = (7x -21)2x = 14x² -42x
( 8x²-2)(7x-3) = 56x³ -24x² -14x +6
(3\2a-6)(3b-1\2) =
(3/2a - 12a/2a ) (3b-1/2) =
9b/2a - 6/4a - 36ab /2a + 12a/4a
(-4-11)(-3y+14)=
-15 (-3y +14)=
+ 45y -210