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-\frac{7}{4}+\frac{\frac{7}{2}}{2}
Rewrite the square root of the division \frac{49}{16} as the division of square roots \frac{\sqrt{49}}{\sqrt{16}}. Take the square root of both numerator and denominator.
-\frac{7}{4}+\frac{7}{2\times 2}
Express \frac{\frac{7}{2}}{2} as a single fraction.
-\frac{7}{4}+\frac{7}{4}
Multiply 2 and 2 to get 4.
0
Add -\frac{7}{4} and \frac{7}{4} to get 0.