a2- 4a+4=(a-2)^2
a2+4a+4=(a+2)^2
所以
根號(hào)下(a2-4a+4)-根號(hào)下(a2+4a+4)
=a-2-(a+2)
=4
化簡根號(hào)下(a2-4a+4)-根號(hào)下(a2+4a+4)
化簡根號(hào)下(a2-4a+4)-根號(hào)下(a2+4a+4)
數(shù)學(xué)人氣:653 ℃時(shí)間:2020-06-25 00:48:57
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