Is this right?

[sarahj3]

the square root of 125 + the square root of 45
square root of 5 * square root of 25
and square root of 5 * square root of 9
equal 8 square root of 5
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[skeeter]

if you meant ...

$\displaystyle \sqrt{125} + \sqrt{45} =$

$\displaystyle \sqrt{25}\sqrt{5} + \sqrt{9}\sqrt{5} =$

$\displaystyle 5\sqrt{5} + 3\sqrt{5} =$

$\displaystyle 8\sqrt{5}$

then yes, you are correct.