若m-a=3,m-b= -12 ,则代数式(2m-a-b)2的值是求帮助.
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![若m-a=3,m-b= -12 ,则代数式(2m-a-b)2的值是求帮助.](/uploads/image/z/2769448-40-8.jpg?t=%E8%8B%A5m-a%3D3%2Cm-b%3D+-12+%2C%E5%88%99%E4%BB%A3%E6%95%B0%E5%BC%8F%282m-a-b%292%E7%9A%84%E5%80%BC%E6%98%AF%E6%B1%82%E5%B8%AE%E5%8A%A9.)
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若m-a=3,m-b= -12 ,则代数式(2m-a-b)2的值是求帮助.
若m-a=3,m-b= -12 ,则代数式(2m-a-b)2的值是
求帮助.
若m-a=3,m-b= -12 ,则代数式(2m-a-b)2的值是求帮助.
m-a=3,m-b= -12
(m-a)+(m-b)=3+(-12)
2m-a-b= -9
所以:
(2m-a-b)²
=(-9)²
=81