Bonsoir.
( 1 - √5 ) 2 = ( 1 )2 - 2√5 + ( √5 )2
= 1 - 2√5 + 5
= - 2√5 + 6.
( 3 + √2 )2 = ( 3 )2 + 6√2 + ( √2 )2
= 9 + 6√2 + 2
= 6√2 + 11
Voilà, j'espère avoir pu t'aider.
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Verified answer
Bonjour ,1/
(1-√5)^2
= 1^2 + (√5)^2 - 2 × 1 × √5
= 1 + 5 - 2√5
= 6 - 2√5 .
2/
(3+√2)^2
= 3^2 + (√2)^2 + 2 × 3 × √2
= 9 + 2 + 6√2
= 11 + 6√2 .
Verified answer
Bonsoir.
( 1 - √5 ) 2 = ( 1 )2 - 2√5 + ( √5 )2
= 1 - 2√5 + 5
= - 2√5 + 6.
( 3 + √2 )2 = ( 3 )2 + 6√2 + ( √2 )2
= 9 + 6√2 + 2
= 6√2 + 11
Voilà, j'espère avoir pu t'aider.