SOLUTION: Please hep me with this problem: {{{sqrt(x+10)+sqrt(x-6)=8}}}

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Question 190413: Please hep me with this problem:
sqrt%28x%2B10%29%2Bsqrt%28x-6%29=8
Answer by dukesmart(20) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt(x+10)+sqrt(x-6)=8
raise to power of 2:
x+10+x-6+ 2(sqrt((x+10)(x-6)))=64
2x+4+ 2(sqrt(x^2+4x-60))=64
2(sqrt(x^2+4x-60) =60-2x
raise to power of 2 :
4(x^2+4x-60)= (60-2x)^2
4x^2+16x-240 = 3600+4x^2-240x

256x = 3840
===========> x = 15