因式分解 a³-ab² ﹣x³+x²-1/4x
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因式分解 a³-ab² ﹣x³+x²-1/4x
a³-ab²
=a(a²-b²)
=a(a+b)(a-b)
﹣x³+x²-¼x
=-x(x²-x+1/4)
=-x(x-½)²
因式分解 a³-ab² ﹣x³+x²-1/4x
a³-ab²
=a(a²-b²)
=a(a+b)(a-b)
﹣x³+x²-¼x
=-x(x²-x+1/4)
=-x(x-½)²