Yes or No? If $N o,$ give a reason. (Disregard any value that makes a denominator zero.)

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\begin{array}{l}{\text { (a) Is the expression } \frac{x(x+1)}{(x+1)^{2}} \text { equal to } \frac{x}{x+1} ?} \\ {\text { (b) Is the expression } \sqrt{x^{2}+25} \text { equal to } x+5 ?}\end{array}

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