bonjour
1 ) A = 3 √75 + 2 √192 - 4 √363
A = 3 √25 * √3 + 2 √64 *√3 - 4 √121 * √3
A = 15√3 + 16 √3 - 44√3
A = - 13 √3
2) 6² + 9² = 117
√117 = √9 * √13 = 3 √13
B = ( x - 3 )² + ( 2 x + 1 ) ( x - 3 )
1 ) B = x² - 6 x + 9 + 2 x² - 6 x + x - 3
B = 3 x² - 11 x + 6
2) B = ( x - 3 ) ( x - 3 + 2 x + 1 )
B = ( x - 3 ) ( 3 x - 2 )
a = 2/3
B = ( 2/3 - 3 ) ( 6/3 - 2)
B = ( 2/3 - 9/3 ) ( 6/3 - 6 /3) = 0
x = - 2
B = ( - 2 - 3 ) ( - 6 - 2 )
B = - 5 * - 8 = 40
