Website Statistics Pouvez vous mexpliquer comment calculer ça svp A 417y 4y5y1B 3t t1 5tt2D 4k19k9k103kE m2 83m21mm7
résolu

Pouvez vous m'expliquer comment calculer ça svp ?

A = 4(1-7y) + (4y-5)(y-1)

B = 3t (t+1) + (5+t)(t-2)

D = (4k-1)(9+k)-9k(10-3k)

E = (m+2) (8+3m)-2(1-m)(m-7)

Répondre :

droopette
A = 4(1-7y) + (4y-5)(y-1)
=4-28y+4y²-4y-5y+5
=4y²-37y+9

B = 3t (t+1) + (5+t)(t-2)
=3t²+3t+5t-10+t²-2t
=4t²+6t-10

D = (4k-1)(9+k)-9k(10-3k)
=36k+4k²-9-k-90k+27k²
=31k²-55k-9

E = (m+2) (8+3m)-2(1-m)(m-7)
=8m+3m²+16+6m-2(m-7-m²+7m)
=8m+3m²+16+6m-2m-14-2m²+14m
=m²+26m+2
il faut developper  4(1-Y)+(4Y-5)(Y-1)=4-4Y+(4Y²-4Y-5Y+5)
                                                             =4-4Y+(4Y²-9Y+5)
                                                              =4Y²-13Y+9
Tu fais pareil pour les autres

D'autres questions