Question 76900
<pre><font size = 5><b>
Here's an example:

                    x² = 6x - 4

Get 0 on the right by adding -6x + 4 to both sides


           x² - 6x + 4 = 0

Use the quadratic formula:
                  ______ 
            -b ± <font face = "symbol">Ö</font>b²-4ac
        x = —————————————
                2a 

where a = 1; b = -6; c = 4

                      _____________ 
             -(-6) ± <font face = "symbol">Ö</font>(-6)²-4(1)(4)
        x = ————————————————————————
                     2(1) 
                  _____ 
             6 ± <font face = "symbol">Ö</font>36-16
        x = ————————————
                 2

                  __ 
             6 ± <font face = "symbol">Ö</font>20
        x = —————————
                2

                  ___ 
             6 ± <font face = "symbol">Ö</font>4·5
        x = ——————————
                2 

                   _
             6 ± 2<font face = "symbol">Ö</font>5
        x = —————————
                2

                     _
             6     2<font face = "symbol">Ö</font>5
        x = ——— ± —————
             2      2
                 _
        x = 3 ± <font face = "symbol">Ö</font>5 

Edwin</pre>