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Bloom59135
@Bloom59135
April 2019
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Svpp c'est pour demain
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nathalienouts
EX 2
(√7+√2)(√7-√2)
= √7²-7√2+7√2-√2²
= 7-2
= 5
(2√3-3)(2√3+3)
= 4√3²+6√3-6√3-9
= 4x3-9
= 12-9
= 3
Ex 3
A = √80-√20(2-√15)
A = 4√5-2x2√5+2√(5x15)
A = 4√5-4√5+2x5√3
A = 10√3
B = √6(√3+5)-√150
B = √(6x3)+5√6-5√6
B = √(3x3x2)
B = 3√2
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(√7+√2)(√7-√2)
= √7²-7√2+7√2-√2²
= 7-2
= 5
(2√3-3)(2√3+3)
= 4√3²+6√3-6√3-9
= 4x3-9
= 12-9
= 3
Ex 3
A = √80-√20(2-√15)
A = 4√5-2x2√5+2√(5x15)
A = 4√5-4√5+2x5√3
A = 10√3
B = √6(√3+5)-√150
B = √(6x3)+5√6-5√6
B = √(3x3x2)
B = 3√2