SOLUTION: 3(x-5)2=21

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Question 565872: 3(x-5)2=21
Answer by ad_alta(240) About Me  (Show Source):
You can put this solution on YOUR website!
1) 3(x-5)^2=21
2) 3x^2-30x+75=21
3) 3x^2-30x+54=0 [use the quadratic formula]
4) x=5 {+/-} sqrt(7)