completing+the+square

Completing the Square Hi, I'm Mac, the friendly computer. I'm going to teach you what completing the square is, and how to do it. Trust me, we'll have lots of fun, thanks to my charming user-interface :) Completing the square is the more difficult way for finding x in a quadratic formula (I know, it stinks, right :( ? Just joking, I'm programmed to say things like that.) Here's how to solve it (I'm going to use variables here, OK? ; ) )

Step 1: x^2 + bx + c = 0 - c -c x^2 + bx = - c Got that? OK, moving on. Step 2: x^2 + bx = - c + (b/2)^2 + (b/2)^2 x^2 + bx + (b/2)^2 = - c (b/2)^2 Hope you got that down. Next step! : ) Step 3: Right here, you can subsitute the above with (x + b/2)^2 = - c + (b/2)^2 square root that x + b/2 = - c + (b/2)^2 Sorry, but I can't help you anymore. Could someone else edit this page, please?