Explicación paso a paso:
10a2+6ab+8ac+45ab+27b2+36bc-5ac-3bc-4c2=
10a2+51ab+3ac+33bc+27b2-4c2
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Explicación paso a paso:
10a2+6ab+8ac+45ab+27b2+36bc-5ac-3bc-4c2=
10a2+51ab+3ac+33bc+27b2-4c2