Solve by completing the square:

x^2 + 7/2x =7 (7/2x is a fraction)

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- Jun 3rd 2010, 06:19 PMbball20complet the square
Solve by completing the square:

x^2 + 7/2x =7 (7/2x is a fraction) - Jun 3rd 2010, 06:25 PMtharris
To ind the "magic number" that will complete the square - use the formula (b/2)^2. Then add this "magic number" to both sides of the equation. After doing this, you will be able to factor the left hand side into a perfect square trinomial. Then simply take the square root of both sides and continue to solve for x. To divide a fraction by two remember to invert and multiply, then simply square the numerator (top) and the denominator (bottom). If you need more help. Let me know.(Rofl)

- Jun 3rd 2010, 06:32 PMbball20
sorry but I am lost? I have no idea what you just said...

- Jun 3rd 2010, 08:02 PMharish21
- Jun 4th 2010, 05:06 AMHallsofIvy
Compare:$\displaystyle (x+ a)^2=$

$\displaystyle x^2+ 2ax+ a^2$ and

$\displaystyle x^2+ (7/2)x+ ?$

With 2a= 7/2, what is a? And then what is $\displaystyle a^2$?