(-1)的平方-【1又3/7+(-12)÷6】的平 - 知识问答

(-1)的平方-【1又3/7+(-12)÷6】的平方×(-3/4)

5个回答

(-1)^2-【1又3/7+(-12)÷6】^2×(-3/4)
=1-【1+3/7-12÷6】^2×(-3/4)
=1-【1+3/7-2】^2×(-3/4)
=1-【-4/7】^2×(-3/4)
=1-16/49×(-3/4)
=1-16/49×3/4
=1-4/49×3
=1-4/147
=143/147

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