bjr
1)
√63 = √(9 x 7) = √9 x √7 = 3√7
√175 = √(25 x 7) = √25 x √7 = 5√7
A = 3√7 x 11√7 x 2 x 5√7 (√7 x √7 = 7)
A = 3 x 11 x 7 x 10 x √7
A = 2310√7
B = 3√7 - 11√7 + 2 x 5√7
= (3 - 11 + 10)√7
= 2√7
2)
A / B = 2310√7 / 2√7 on simplifie par √7
= 2310 / 2 on simplifie par 2
= 1155
