用公式计算(2y-3x)(4y²+6xy+9x²﹚公式(a-b)(a²+ab+b²)=a³-b³
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![用公式计算(2y-3x)(4y²+6xy+9x²﹚公式(a-b)(a²+ab+b²)=a³-b³](/uploads/image/z/567900-36-0.jpg?t=%E7%94%A8%E5%85%AC%E5%BC%8F%E8%AE%A1%E7%AE%97%282y-3x%29%284y%26%23178%3B%2B6xy%2B9x%26%23178%3B%EF%B9%9A%E5%85%AC%E5%BC%8F%EF%BC%88a-b%EF%BC%89%EF%BC%88a%26%23178%3B%2Bab%2Bb%26%23178%3B%EF%BC%89%3Da%26%23179%3B-b%26%23179%3B)
用公式计算(2y-3x)(4y²+6xy+9x²﹚公式(a-b)(a²+ab+b²)=a³-b³
用公式计算(2y-3x)(4y²+6xy+9x²﹚
公式(a-b)(a²+ab+b²)=a³-b³
用公式计算(2y-3x)(4y²+6xy+9x²﹚公式(a-b)(a²+ab+b²)=a³-b³
(2y-3x)[(2y)^2+2y*3x+(3x)^2]
=(2y)^3-(3x)^3
=8y^3-27x^3