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First find the answer without decimals
√225= 15
2.25 has two decimal places, so therefore the square root must contain 1 decimal place.
√2.25= 1.5
Final answer: 1.5
ps -1.5 is also correct but I'm not sure if that's what your teacher wants.
We can write any number n in the form
, since
and
are inverse functions, so that

The bases are the same on both sides, so the exponents must be equal.

Solve for x :

