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Krzysztof solved the quadratic equation 11x^2-44x-99=0 by completing the square. In the process, he came up with the equivalent equation (x+r)^2 = s,where r and s are constants.What is r+s.

 Jul 11, 2020
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11x^2 -44x  - 99 = 0

x^2 - 4x - 9  = 0

x^2 - 4x  =  9 

x^2 - 4x + 4  =   9 + 4  

(x - 2)^2  =  13

( x +  -2)^2  = 13

r =  -2        s  = 13

Now, I am pretty sure you can solve what r+s is.

 Jul 11, 2020

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