document.write( "Question 726939: Can not grasp the concept make no sense to me. I really need help with this one. Find the intervals where f is increasing, and the intervals where f is decreasing. 2x^2 - 12x + 19.\r
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Algebra.Com's Answer #444913 by josgarithmetic(39617) $\"\"$ $\"About$

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Recognize that the polynomial is the function of a parabola so it will have either a minimum or maximum point. The polynomial here has a minimum point. Can you find this point (the vertex)? Alternatively, can you find (Real) zeros where the function crosses the x-axis? The x value of the vertex would be directly in the middle of them. The the left of the vertex as x approaches the vertex, the function is decreasing. To the right of the vertex as x tends to the right, the function is increasing. \r
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\n" ); document.write( "\n" ); document.write( "In case the function does not have Real zeros, you can still convert to standard form (by completing the square) and find the vertex. \r
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\n" ); document.write( "\n" ); document.write( "I did not solve the problem for you but gave guidance so that you might be able to solve the problem on your own. \n" ); document.write( "

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