bonjour
√ 10 000 = √100 x √ 100 = 100
√ 10 ³ = √ 1 000 = √100 * √10 = 10 √ 10
√ ( - 13)² = 13
A = √27 x √32
A = √3 * √9 * √2 * √16
= 3 √3 * 4 √2
= 12 √6
A = √45 + 3 √20
= √5 * √9 + 3 √5 * √4
= 3 √5 + 6 √5
= 9 √5
B = ( 2 + 3 √5) ²
= 4 + 12 √5 + 45
= 49 + 12 √5
A = √ 144 + 25 (tout sous même racine ) = √ 169 = 13
B = √144 + √25 = 12 + 5 = 17