bonjour
f(x) = 2 x² - 18
f ( - 3 ) = 18 - 18 = 0
f (x) = 2 ( x² - 9 )
f (x) est> 0
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bonjour
f(x) = 2 x² - 18
f ( - 3 ) = 18 - 18 = 0
f (x) = 2 ( x² - 9 )
f (x) est> 0