x^2 + (b/a)x + / <4a^2> = -c/a + / <4a^2> factor the right side....get a common denominator on the left

^2 = / <4a^2> take the square roots of both sides

x + (b/2a) =±√/<2a> subtract (b/2a) from both sides

x = (-b±√) / <2a>

Voila!!!....we have the Quadratic Formula..... !!!!


CPhill Mar 22, 2015

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If we do this correctly....we will arrive at a familiar formula....let"s see...

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ax^2+bx+c=0 subtract c from both sides

ax^2 + bx = -c divide through by a

x^2 +(b/a)x = -c/a complete the square on x

x^2 + (b/a)x + / <4a^2> = -c/a + / <4a^2> factor the right side....get a common denominator on the left

^2 = / <4a^2> take the square roots of both sides

x + (b/2a) =±√/<2a> subtract (b/2a) from both sides

x = (-b±√) / <2a>

Voila!!!....we have the Quadratic Formula..... !!!!


CPhill Mar 22, 2015
 #2
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+117117 
0

Thanks Chris :)


Melody Mar 22, 2015
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