Lowe Willis
06/24/2024 · Middle School

Create 13. Solve \( (x-3)(x+1)(x+4)>0 \)

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Solve the equation \( (x-3)(x+1)(x+4)>0 \). Solve the inequality by following steps: - step0: Solve the inequality by testing the values in the interval: \(\left(x-3\right)\left(x+1\right)\left(x+4\right)>0\) - step1: Rewrite the expression: \(\left(x-3\right)\left(x+1\right)\left(x+4\right)=0\) - step2: Separate into possible cases: \(\begin{align}&x-3=0\\&x+1=0\\&x+4=0\end{align}\) - step3: Solve the equation: \(\begin{align}&x=3\\&x=-1\\&x=-4\end{align}\) - step4: Determine the test intervals: \(\begin{align}&x<-4\\&-43\end{align}\) - step5: Choose a value: \(\begin{align}&x_{1}=-5\\&x_{2}=-3\\&x_{3}=1\\&x_{4}=4\end{align}\) - step6: Test the chosen value: \(\begin{align}&x<-4\textrm{ }\textrm{is not a solution}\\&-43\textrm{ }\textrm{is the solution}\end{align}\) - step7: The final solution is \(x \in \left(-4,-1\right)\cup \left(3,+\infty\right):\) \(x \in \left(-4,-1\right)\cup \left(3,+\infty\right)\) The solution to the inequality \( (x-3)(x+1)(x+4)>0 \) is \( x \in (-4,-1) \cup (3,+\infty) \).

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\( x \in (-4,-1) \cup (3,+\infty) \)
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