Question
factoriser 20xau carré +3-7x
SVP et merci beaucoup
SVP et merci beaucoup
Asked by: USER7641
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Answer (57)
Bonjour
Factoriser 20xau carré +3-7x
= 20x^2 - 7x + 3
= (xV20)^2 - 2 * xV20 * 7/(2V20) + [7/(2V20)]^2 - [7/(2V20)]^2 + 3
= [xV20 - 7/(2V20)]^2 - 49/80 + 240/80
= [xV20 - 7/(2V20)]^2 + 191/80
On ne peut pas plus factoriser