7. √(x+b/2a)^2 = ±√(b^2-4ac/4a^2)
8. x + b/2a = ±√(b^2-4ac)/2a
9. x = (-b ± √(b^2-4ac))/2a
This completes the derivation of the Quadratic Formula.
The first six steps of the derivation of the Quadratic Formula are listed below.
1. ax^2+bx+c=0
2. a/a x^2+b/a x+c/a=0/a
3.x^2+b/a x+c/a=0
4.x^2+b/a x=-c/a
5.x^2+b/a x +b^2/4a^2=-c/a+b^2/4a^2
6.(x+b/2a)^2=b^2-4ac/4a^2
the seventh step is blank
the eight step is blank
the ninth step is blank
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