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Sagot :

Bonjour,

y²: un carré est toujours positif, donc impossible

8a² - 2 = 0

8a² =2

a² = 2/8 = 1/4

a = 1/2

(4t+1)² =9

4t+1 = 3

(3²=9)

4t = 3-1

4t = 2

t= 2/4 = 1/2

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