Correct me If am completely wrong.<br /><br />
√x-9=4<br /><br />
x-81=16<br />
x=16+81<br />
x=97
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if the root is for x-9 ,
√x-9=4
square on both sides
x-9=16
x=16+9
x=25
if the root is for x
√x-9=4
√x=4+9
√x=13
x=13²=169
√x-9=4
square on both sides
x-9=16
x=16+9
x=25
if the root is for x
√x-9=4
√x=4+9
√x=13
x=13²=169
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