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The negative exponent makes the fraction flip. The 4 on the bottom becomes the root while the 3 stays with the fraction as the exponent. ... from the larger one (1/2) to get a positive exponent on the denominator. To reduce the 50 and the 18, I find the biggest perfect square that goes into each one. 50 breaks up into 25 x 2 and 18 into 9 x 2. ................
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