Cho biểu thức \( S = \frac{x^2 + y^2}{x + y} \), với \( x = 4 \) và(04)


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Examples of Warning Signs You Shouldn't IgnoreEarly Signs Of Heart Disease You Shouldn't IgnoreVehicle Warning Signs You Shouldn't Ignore Motorama7 Symptoms That Should Never Be Ignored Body Signs You Shouldn'tCho biểu thức \( S = \frac{x^2 + y^2}{x + y} \), với \( x = 4 \) và