答案:A
解析:
Since (t-2)^2 = (t-2)*(t-2) = 0, it follows that t-2 = 0, and so t = 2. Therefore, (t+3)*(t+6) = (2+3)*(2+6) = (5)*(8) = 40.
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答案:A
解析:
Since (t-2)^2 = (t-2)*(t-2) = 0, it follows that t-2 = 0, and so t = 2. Therefore, (t+3)*(t+6) = (2+3)*(2+6) = (5)*(8) = 40.