把下列格式分解因式 (x+y)²-8(x+y)+161.(x+y)²-8(x+y)+162.25a四次方-40a²b²+16b四次方3.3-6x+3x²4.8a²-16a+85.m²-0.2m+0.016.9(a+b)²+6(a+b)+17.(m+n)²-12(m+n)+368.4(2p+3q)

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