Here's the question you clicked on:
mslorraine
√(9x+67=x+5=)
do u mean \[\sqrt{9x+67} = x+5 \] find x?
now you need to square both sides so it will be \[9x+67 = (x+5)^{2}\] \[9x +67 = x ^{2} + 10x + 25\] \[x ^{2} + x -42 = 0\] I guess it is clear now :) note that you need to get rid of square roots in most problems by squaring you can get rid of it