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幼苗
共回答了15个问题采纳率:93.3% 举报
0.75*3.66-3/4*2.66
=3/4*3.66-3/4*2.66
=3/4*(3.66-2.66)
=3/4*1
=3/4
(-1/2)^2001+(1/2)^2000
=-(1/2)^2001+(1/2)^2000
=-(1/2)*(1/2)^2000+(1/2)^2000
=(1/2)^2000*(-1/2+1)
=1/2*(1/2)^2000
=(1/2)^2001
2*56^2+8*56*22+2*44^2
=2*(56^2+4*56*22+44^2)
=2*(56^2+2*56*44+44^2)
=2*(56+44)^2
=2*100^2
=2*10000
=20000
1年前
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