SOLUTION: Give exact and approximate solutions to three decimal places. (x-12)^2=20

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Question 321460: Give exact and approximate solutions to three decimal places.
(x-12)^2=20
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
(x-12)^2=20
x^2-24x+144=20
x^2-24x+144-20=0
x^2-24x+124=0
Approximate values 16 & 8.
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x=(24+-sqrt[-24-4*1*124])/281
x=(24+-sqrt[576-496])/2
x=(24+-sqrt80)/2
x=(24+-8.944)/2
x=24+8.944)/2
x=32.994/2
x=16.472 ans.
x=(24-8.944)/2
x=15.056/2
x=7.528 ans.