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24. It is known that a and b are rational numbers, and the value of a2+b2-2a-4b+8 is positive. 2 After a and b is the square
Original formula =(a2-2a+1)+(b2-4b+4)+3
=(A-1)2+(b-2)2+3
The square must be greater than or equal to 0, so the above formula must be a positive number
If the 3rd power of a number is negative, then the 13th power of the number is () and the 26th power is () to fill in positive or negative numbers
13 Negative,26 positive
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