Răspuns:
Explicație pas cu pas:
vezi tabel
(x-4) (x-2)/(9-x²)≥0
x |-∞ -3 2 3 4 ∞
x²-6x+8 | ++++++++++++++++++++0------------------------0+++++++++++++
9-x² | _-------------------0++++++++++++++++0------------------------------
Expresia | ------------------| ++++++++++0------- |++++++++0 -----------------