9(x+y)^2-6(x+y)+1进行因式分解

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9(x+y)^2-6(x+y)+1进行因式分解

9(x+y)^2-6(x+y)+1进行因式分解
9(x+y)^2-6(x+y)+1进行因式分解

9(x+y)^2-6(x+y)+1进行因式分解
9(x+y)^2-6(x+y)+1
=【3(x+y)-1】²

9(x+y)^2-6(x+y)+1
=(3x+3y-1)^2
=(3x+3y-1)(3x+3y-1)

9(x+y)²-6(x+y)+1
=[3(x+y)-1]²
=(3x+3y-1)²

原式 = (3(x+y))² -2 * 3(x+y) * 1 +1
=(3(x+y)+1)²
=(3x+3y+1)²

[3(x+y)-1]^2

[3(x+y)-1]^2