2.π = 3. 14 1592 ...π is greater than 3. 14, because 3. 14-π is less than 0, so the square takes precedence, so it is π-3. 14.

3. Because √2 1 is between √25 and √ 16, the integer part is 4, so the decimal part is √2 1-4, so a? -B? = 16-(√2 1-4)^2=8√2 1-2 1