Problem

Find the interval notation of the solution set of the inequality 2x25x+2>0, then convert it into inequality notation.

Answer

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Answer

To convert this into inequality notation, we can write it as x<1 or x>2.

Steps

Step 1 :First, we must solve the inequality. We start by finding the roots of the quadratic equation 2x25x+2=0.

Step 2 :This can be done using the quadratic formula x=b±b24ac2a, where a=2, b=5, and c=2.

Step 3 :Substituting the values, we get x=5±(5)242222 which simplifies to x=5±94. Therefore, the roots of the equation are x=1 and x=2.

Step 4 :Since we want to find when the equation is greater than 0, we test the intervals ,1, 1,2, and 2, to determine where the function is positive.

Step 5 :If we substitute any value less than 1 into the equation, we get a positive result. If we substitute any value between 1 and 2, we get a negative result. If we substitute any value greater than 2, we get a positive result.

Step 6 :Therefore, the interval notation for the solution is (,1)(2,).

Step 7 :To convert this into inequality notation, we can write it as x<1 or x>2.

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