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calculer D =6t2 -4 poir t=3 et calculer E =(a+3) (3b-7) pour a =5 et b= -2
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AIMLERARD

D = 6t2 -4

D = 6X3+2-4

D = 18+2-4

D = 20-6

D = 14

E = (a+3) (3b-7)

E = (5+3) X (5X-2-7)

E = 8 X -17

E = -136

Bonjour, Bonsoir et de rien !