Réponse
1 ×a+0×c= a+0= a
(8×c+5)×(4-6×c)= (8c+5)x(4-6c)= 32c-48c²+20-30c = -48c²+2c+20
d×d+3×(5×d)= d²+15d
Explications :
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Réponse
1 ×a+0×c= a+0= a
(8×c+5)×(4-6×c)= (8c+5)x(4-6c)= 32c-48c²+20-30c = -48c²+2c+20
d×d+3×(5×d)= d²+15d
Explications :