It is known that a B is opposite to each other and C D is reciprocal to each other. The square of X is equal to 4. Try to find the value of X2 - (a + B + CD) x + (a + b) 2007 + (CD) 2008

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• 15. What is the meaning of the 0.5 power of 5? How to calculate it? I mean the power What about 0.8 power
• 16. From the meaning of power, we can see that: 2 ^ 3 * 2 ^ 4 = (2 * 2 * 2) * (2 * 2 * 2) = 2 ^ 7, please use this method to simplify the cubic power of 4 and the cubic power of B c'mon
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