Aidez moi svp !!
1) Résoudre dans R les inéquations :
a) x² -6x +9 ≤ (x -3)(3x+5)
b) (x² +4)(3x -1)/ 5x+3 ≥ 0
c) (2x -5)(7 -3x)≥ 4x² -25
d) x+1/1-2x ≤ 1/2
e) l 1-5x l = l 3x+2l l l : valeur absolue
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