How would I complete the square with the following?
4x^2-25
I thought of but that doesn't make any sense!
Any help please?
Why would you want to complete the square? This is the difference of two squares and will easily factor
and the difference of two squares is
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If you want/must to complete the square you have the right idea but the first step is always to make sure the coefficent of is
You "complete the square" to get rid of a term of the form "ax", that is x to the 1 power, in a quadratic. In your example, , there is no "x" term- " " is already a perfect square. The minimum value occurs when x= 0 and is -25. Since the graph of is a parabola with vertex at (0, -25), vertical axis, opening upward, and with x-intercepts at (5/2, 0) and (-5/2, 0).