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The quadratic 3x^2-24x+72 can be written in the form a(x+b)^2+c, where a, b, and c are constants. What is a+b+c?

 Jun 29, 2021
 #1
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3x^2-24x+72               re-arrange

3 (x^2 -8x) + 72          complete the square for 'x'   

3 ( x-4)^2  -48 + 72

3 (x-4)^2 +24                now add a b c

 Jun 29, 2021

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