+590 A square root of something means that the square of the result would become the original number.
No rational number is squared to become 45. Probably the closest is 7, because 7^2=49.
The square root of 45 would be represented as √45. It's not a perfect square.
Of course, you could plug √45 into a calculator.
But the decimal places would go on forever.
Here's what I got when I put √45 into this website's calculator:
6.7082039324993691
It looks like the decimal places end, but the decimal places go on forever. The calculator rounded it.
These numbers are called irrational numbers.
They can't be expressed as a fraction.
