The other tutor only gave you an approximate decimal solution using
a calculator.  That's not what your teacher wants.  Your teacher wants
an exact answer.  Here's the way to do it using fraction exponents:



Write both 12's as 22·3

  

Write the square root as the  power
and the cube root as the  power:



Make everything have an exponent by giving a 1 exponent
to whatever doesn't have an exponent showing:



Remove the inner parentheses by multiplying exponents:





Add the exponents of 2 and the exponents of 3



Change mixed number exponent  to 



Remove the remaining parentheses by multiplying exponents:







Erase the 1 exponent and change the  exponent to a square root



Edwin

_______________

________ ------- Multiplying exponents

_______ ------>  ------>  

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