Bonjour vous pouvez m'aidez s'il vous plaît reconnaitre une identité remarquable
B = (5x + 1)2 - 49
On sait que 49:
B = (5x + 1)2 - 2
B = (5x + 1 .......(5x + 1 .........
)
(5x .......... .)(5x .........)
On reconnait
B = (5x​
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