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Brynlee
07-06-2013, 09:53 AM
SAT-Solving simple surd equation

How to solve the following surd equation

\sqrt{a}-4=5 ??

Thanks:o

miranda
07-06-2013, 10:00 AM
In order to solve the following surd equation

\sqrt{a}-4=5

you have first write the equation with only the square root on the left hand side

\sqrt{a}=9

and then square both sides of the equation

(\sqrt{a})^2=9^2

a=81

another SAT quick way is to check the given possible answers by substituting them back into the original equation!!:o:o


Hope these help!!

Brynlee
07-06-2013, 10:18 AM
Thank you miranda!!:o