perplexus.info :: Just Math : Two ways to solve

Two ways to solve (Posted on 2023-03-20)

x^2-4=sqrt(x+4)

Hint: there is a tricky way to solve it !

No Solution Yet Submitted by Ady TZIDON

Rating: 4.0000 (1 votes)

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re: Two methods, tricky and brute force

Comment 3 of 3 |

Try this trck:

Generalize, replacing 4 by t

Solve the quadratic equation ,

get the possible values for t and restore the original 4 instead.

Is it cool ?

Posted by Ady TZIDON on 2023-03-29 02:19:13

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