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求因式分解
展开全部
=(x+3-1)^4+(x+3+1)^4-56
=2(x+3)^4+12(x+3)²+2-56
=2(x+3)^4+12(x+3)²-54
=2((x+3)²-3)((x+3)²+9)
=2(x+3+√3)(x+3-√3)(x²+6x+18)
=2(x+3)^4+12(x+3)²+2-56
=2(x+3)^4+12(x+3)²-54
=2((x+3)²-3)((x+3)²+9)
=2(x+3+√3)(x+3-√3)(x²+6x+18)
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