Calcul littéral Lycée  Développer ou factoriser:
a) 2(x - 3)² -------- b) 6x(x - 4) - 2 (3 - 5x) --------- c) x² - 1 

Résoudre dans R, les équations: 
a) (3 - 4x) (x - 4) = 0 ---------- b) 7x - 2 = 5x - 4
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PS: 6x se lit " Six ix " et non " Six fois " dans la b) du 1.
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