0.222²-1.222²=;67²+66×6+33²
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0.222²-1.222²=;67²+66×6+33²0.222²-1.222²=;67²+66×6+33²0.222&
0.222²-1.222²=;67²+66×6+33²
0.222²-1.222²=;67²+66×6+33²
0.222²-1.222²=;67²+66×6+33²
0.222²-1.222²
=(0.222-1.222)(0.222+1.222)
=-1×1.444
=-1.444
67²+66×67+33²
=67²+2×33×67+33²
=(67+33)²
=100²
=10000