bonjour
A = 5/14 + 9/14 * 7/5 - 2/5
= 5/14 + 63/70 - 2/5
= 25/70 + 63/70 - 28/70
= 60/70
= 6/7
B = - 2 √48 + √75
B = - 2 √3 * √16 + √3 *√25
B = - 8√3 + 5 √3
B = - 3 √3
C = 2 x² + 10 x - 3 x - 15 - ( x² + 4 x + 4 )
= 2 x² + 7 x - 15 - x² - 4 x - 4
= x² + 3 x - 19
d = ( 5 + 3 x - 4 ) ( 5 - 3 x + 4 )
= ( 3 x + 1 ) ( - 3 x + 9 )
45 * 1.03 = 46.35 €
