Saturday, August 30, 2008
Journal no. 12
It was easy to understand because the only thing that you must put only in your mind is "if x1 and x2 are the roots of the quadratic equation ax2 + bx = c = 0, then
x1 + x2 + -b/a and x1 x2 = c/a...
Posted by mariavizconde@blogspot.com at 6:51 PM
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