Răspuns:
Explicație pas cu pas:
6x+9=0
2x= -3
x= -3/2
-2x -4=0
-2x= 4
x= - 2
x | -∞ -2 -3/2 +∞
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6x+9 | - - 0 + +
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-2x-4 | + 0 - - -
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E(x) | - | + 0 - -
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X∈ (-∞ , -2) ∪ [-3/2 , +∞ )