How do you solve $sqrt(x+7)+2=4$ ?

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Answer 1 · 2015-10-12T20:35:19

$x=-3$

Re-arranging the equation we get

$sqrt(x+7)=2$

Now squaring both sides we get

$+-(x+7)=4$

$therefore x=-11 or x=-3$

Clearly $x!=-11$ since this results in a value $!in RR$

$therefore x=-3$

How do you solve sqrt(x+7)+2=4sqrt(x+7)+2=4?