Question

8 Resolva a inequação (x²-9) (x² + x) < 0​

Answer 1

x²-9<0

x²+x>0

x²-9>0

x²-x<0

x∈ {-3,3}

x∈{ -∞,-1} ∪ { 0,+∞}

x∈{ -∞,-3} ∪ { 3,+∞}

x∈{ -1,0}

x∈{ -3,-1} ∪ { 0,3}

∅

x∈{ -3,-1}∪{0,3}