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Sagot :

LAU16
1) 1.
2) a) 3x + 2
    b) 3 fois 5 + 2 = 15 + 2 = 17 m²
3)  a) x² + 3 - 3x + 2
     b) (5² + 3) - (3 fois 5 + 2) = (25 + 3) - (15 + 2) = 28 - 17 = 11 m².
1) valeur minimal 4
2) (4+2)x3=18m carré
(5+2)x3=21m carré

3) (4+3)x4=21
18-21=3m carré
(5+3)x4=24
21-24=3m carré

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