如题所述
解ï¼46x46
=ï¼45+1ï¼xï¼45+1ï¼
=ï¼45+1ï¼²
=45²+2x45x1+1²
=2025+90+1
= 2 116
54x46
=ï¼50+4ï¼xï¼50-4ï¼
=50²-4²
=2500-16
=2 484
=ï¼45+1ï¼xï¼45+1ï¼
=ï¼45+1ï¼²
=45²+2x45x1+1²
=2025+90+1
= 2 116
54x46
=ï¼50+4ï¼xï¼50-4ï¼
=50²-4²
=2500-16
=2 484
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