Final answer:
The result of 'Poor minus' would depend on whether the number being subtracted is positive or negative. Subtraction involves changing the sign of the number being subtracted and then adding, while multiplication, division, and powers follow specific sign rules.
Step-by-step explanation:
The result of the expression Poor minus: (P-) or 2- refers to basic arithmetic operations of subtraction and potentially negative numbers. When subtracting, simply change the sign of the number being subtracted and then follow the rules of addition. For example, to subtract a positive number, such as subtracting 3 from 5, we would calculate 5 - (+3) which equals 2. This means that we subtract 3, and its sign changed before operating addition.
Similarly, when subtracting a negative number, we actually add its absolute value to the number we are subtracting from. As another example, when we subtract -6 from 2, we calculate 2 - (-6), which equals 2 + 6 and thus the result is 8.
Additional concepts like multiplication, division, and powers follow their own rules. For multiplication of two numbers with opposite signs, say (-3) x 2, the result has a negative sign, and so the answer is -6. Division follows the same sign rules as multiplication. In the case of powers, a negative exponent means the base is taken to the power on the denominator, so 3^-4 is the same as 1/(3^4), which simplifies to 1 over 3 multiplied by itself 4 times.