bonjour
f(x) = 3 x² - 2 x + 7
f( - 1/3) = 3 ( - 1/3)² - 2 ( -1/3) + 7
f ( - 1/3 ) = 3 * 1/9 + 2/3 + 7
f ( - 1/3 ) = 3/9 + 6/9 + 63/9 = 72/9 = 8
f( 2 - √3) = 3 ( 2 -√3)² - 2 ( 2 - √3) + 7
f (2 - √3) = 3 ( 4 - 4√3 + 3) - 4 + 2 √3 + 7
f ( 2 - √3) = 12 - 12 √3 + 12 - 4 + 2 √3 + 7
f ( 2 - √3) = 27 - 10 √3
