5. 2
3. 3
4. 321
3. Решение: (2-1/8)^2-1/8*(-1/8-4)=1 7/8^2+1/8*(-4 1/8)=225/64-33/64=192/64=3
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5. 2
3. 3
4. 321
3. Решение: (2-1/8)^2-1/8*(-1/8-4)=1 7/8^2+1/8*(-4 1/8)=225/64-33/64=192/64=3