In Problems $7-22,$ solve each inequality. $9 . x^{2}-4 x>0$
Added by Travis H.
Step 1
First, we can factor the inequality: $9x^2 - 4x > 0 \implies x(9x - 4) > 0$ Now, we can find the critical points by setting each factor equal to zero: $x = 0$ and $9x - 4 = 0 \implies x = \frac{4}{9}$ We can now test the intervals determined by these critical Show more…
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