分解因式 (3x-5y)²+2(3x-5y)+1 4x²-(1/4 y²)
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分解因式 (3x-5y)²+2(3x-5y)+1 4x²-(1/4 y²)
分解因式 (3x-5y)²+2(3x-5y)+1 4x²-(1/4 y²)
分解因式 (3x-5y)²+2(3x-5y)+1 4x²-(1/4 y²)
(3x-5y)²+2(3x-5y)+1
=(3x-5y+1)²
4x²-(1/4 y²)
=4(x²-1/16y²)
=4(x+1/4y)(x-1/4y)