Bonjour,
Factoriser y²-y(4y-7)
Développer tout d'abord
y²-y(4y-7)= y² - y*4y - y(-7)= y²-4y²+7y= -3y²+7y
On factorise:
y²-y(4y-7)= -3y²+7y= y(3y + 7)= -y(3y - 7)
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Bonjour,
Factoriser y²-y(4y-7)
Développer tout d'abord
y²-y(4y-7)= y² - y*4y - y(-7)= y²-4y²+7y= -3y²+7y
On factorise:
y²-y(4y-7)= -3y²+7y= y(3y + 7)= -y(3y - 7)