3(5-2√6)⁴-28(5-2√6)³-17(5-2√6)²+2(5-2√6)-10=?
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3(5-2√6)⁴-28(5-2√6)³-17(5-2√6)²+2(5-2√6)-10
=3(5-2√6)⁴-28(5-2√6)³-20(5-2√6)²+3(5-2√6)²+2(5-2√6)-10
=[3(5-2√6)²+2]*[(5-2√6)²-10]+3(5-2√6)²+2-2-4√6
=[3(5-2√6)²+2]*[(5-2√6)²-10+1]-2-4√6
=[3(5-2√6)²+2]*(40-20√6)-2-4√6
=20(151-20√6)*(2-√6)-2-4√6
=20(422-191√6)-2-4√6
=8440-3820√6-2-4√6
=8438-3824√6
=3(5-2√6)⁴-28(5-2√6)³-20(5-2√6)²+3(5-2√6)²+2(5-2√6)-10
=[3(5-2√6)²+2]*[(5-2√6)²-10]+3(5-2√6)²+2-2-4√6
=[3(5-2√6)²+2]*[(5-2√6)²-10+1]-2-4√6
=[3(5-2√6)²+2]*(40-20√6)-2-4√6
=20(151-20√6)*(2-√6)-2-4√6
=20(422-191√6)-2-4√6
=8440-3820√6-2-4√6
=8438-3824√6
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