SOLUTION: How to solve, i had this for my exam {{{d=sqrt(-144 + 16a^2)}}} Thank you

Question 543262: How to solve, i had this for my exam

Thank you
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!

a > 3, to prevent having the square root of a negative number.
:
Assume they want you to solve for a
square both sides and write it like this
-144 + 16a^2 = d^2
16a^2 = d^2 + 144
:
Divide both sides by 16
a^2 =
:
Square both sides and you have
a =
:
Extract the square root of 1/16
a = *
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