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Sagot :

CONST123

Réponse:

Bonjour

A= (5x-1)²

A= 5x × 5x + 5x × (-1) -1 × 5x -1× (-1)

A= 25x² - 5x -5x + 1

A= 25x² -10x +1

NEKFEUU

Réponse :

Bonjour,

[tex]A = (5x -1)^{2} \\A = (5x)^{2} - 2*5x*1+1^{2} \\A = 25x^{2}-2*5x*1+1^{2} \\A = 25x^{2} -10x+1^{2} \\A= 25x^{2} -10x + 1\\[/tex]

Voila bonne journée..

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