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Sagot :

Réponse :

Explications étape par étape :

A=(X+4)(X+3)

  =X²+3X+4X+12

=X²+7X+12

B=(Y+3)(2Y+8)

=2Y²+8Y+6Y+24

=2Y²+14Y+24

C=(3X+4)(5-6X)

=15X-18X²+20-24X

= -9X-18X²+20

D=(-7T+8)(3-5T)

=-21T+35T²+24-40T

=-61T+35T²+24

A=(7-3X)(9X-3)

=63X-21-27X²+9X

=72X-21-27X²

B=(-2-3Y)(4-8Y)

=-8+16Y-12Y+24Y²

=-8+4Y+24Y²

C=(4A+6)(-3-5A)

=-12A-20A²-18-30A

=-42A-20A²-18

D=(5Z-7)(8Z+2)

=40Z²+10Z-56Z-14

=40Z²-46Z-14

D

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