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What are the solution(s) of x^2-4=20?

What are the solution(s) of x^2-4=20?
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What are the solution(s) of x^2-4=20?

User Fbuchinger
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x^2-4=20\qquad|+4\\\\x^2=24\to x=\pm√(24)\\\\x=-√(4\cdot6)\ \vee\ x=√(4\cdot6)\\\\x=-2\sqrt6\ \vee\ x=2\sqrt6

User Denis Evseev
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