add or subtract by first simplifying each radical and then combining any like radicals. Assume that all variables represent positive numbers.
square root of 49x^2+ square root of 16x^2-17 square root of x
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Square re of 16x^2=4x
7x+4x-17 sqrt x
11x-17 sqrt X. ..............Unfortunately, I may not have understood the question well!..be free to inquiry
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