slt jai des exo pour demain et j'y arrive pas voila les questions: merci davance :)
regrouper puis reduire
5z-4.5-z+0.5
5xaucarré-4+2xaucarré-9
6x+8xaucarré-9x-xaucarré
9xaucarré-xy+7+4yaucarré+5xy-8xaucarré-11
merci : )
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