bonjour
niveau collège et pas lycée, merci
( 2 x - 3 ) ( 5 - x ) = 0
soit 2 x - 3 = 0 et x = 3/2
soit 5 - x = 0 et x = 5
4 x - 11 = 13
4 x = 13 + 11
4 x = 24
x = 6
- 7 + 275 x 75 = calculatrice
√24 + √54 = 2 √6 + 3 √6 = 5 √ 6
14 x ( 10 ³)² x 3 x 10 ² / 6 x 10 ⁸
= 42 x 10 ⁶ x 10 ² / 6 x 10 ⁸
= 42 x 10 ⁸ / 6 x 10 ⁸
= 7 x 10 ⁰
= 7