Math Help Forum - View Single Post - Algebra with pq-formula

liljeros · #8 May 22nd, 2008, 11:57 AM

Quote:

Originally Posted by masters

$x=\frac{a+b}{2}\pm\sqrt{(\frac{a+b}{2})^2-ab}$
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$x_1=\frac{a+b}{2} + \sqrt{\frac{a^2+2ab+b^2}{4}}-ab$

$x_1=\frac{a+b}{2}+\sqrt{\frac{a^2+2ab+b^2}{4}}-\frac{4ab}{4}$

$x_1=\frac{a+b}{2}+\sqrt{\frac{a^2+2ab+b^2-4ab}{4}}$

$x_1=\frac{a+b}{2}+\sqrt{\frac{a^2-2ab+b^2}{4}}$

$x_1=\frac{a+b}{2}+\frac{a-b}{2}$

$x_1=\frac{a+b+a-b}{2}$

$x_1=\frac{2a}{2}$

$x_1=a$

Now, perform a similar task to find $x_2$

You really are the master!

A friend to me explained the thing you were talking about before and it seems like I have learnd that and it helped me alot! Thank you *2

Very kind of you to help me out!