SOLUTION: {{{x^2=21-sqrt(x^2+9)}}}. Need help with this equation please

SOLUTION: {{{x^2=21-sqrt(x^2+9)}}}. Need help with this equation please

Algebra.Com

Question 852787: . Need help with this equation please
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
x^2-21+sqrt(x^2+9)=0
x=4 x=-4
check
16-21+5=0
ok

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