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Chtis1180
@Chtis1180
January 2021
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Bonsoir merci d'avance a se qui m’aideront
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anylor
Bonjour,
a)
√3 ×√12×√5 =√3×√(2×2×3)×√5
=√(3×2×2×3×5)
= 2×3√5
=6√5
b)
√6×√14×√7
=√(2×3×2×7×7)
= 2×7√3
=14√3
c)
√10/√2 ×√5
= √(5×2×5) /√2
=5√2 /√2 on simplifie par √2
=5
d)
√2÷√27 × √6÷√2
=(
√2×√6 ) / (√27×√2)
=√(2×2×3) / √(3×3×3×2)
=(2√3) / ( 3√3×√2)
= 2 / 3√2
= √2×√2 /3√2
on simplifie par √2
=√2/3
2 votes
Thanks 1
Chtis1180
merci bcq
anylor
de rien, avec plaisir
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a)
√3 ×√12×√5 =√3×√(2×2×3)×√5
=√(3×2×2×3×5)
= 2×3√5
=6√5
b)
√6×√14×√7
=√(2×3×2×7×7)
= 2×7√3
=14√3
c)
√10/√2 ×√5
= √(5×2×5) /√2
=5√2 /√2 on simplifie par √2
=5
d)
√2÷√27 × √6÷√2
=(√2×√6 ) / (√27×√2)
=√(2×2×3) / √(3×3×3×2)
=(2√3) / ( 3√3×√2)
= 2 / 3√2
= √2×√2 /3√2
on simplifie par √2
=√2/3