计算:[(x+¼y)+(x-¼y)](2x²-1/8y²)计算:[(x+¼y)+(x-¼y)](2x²-1/8y²)要用简便计算 [(x+¼y)²+(x-¼y)²](2x²-1/8y²)刚刚题目打错了

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计算:[(x+¼y)+(x-¼y)](2x²-1/8y²)计算:[(x+¼y)+(x-¼y)](2x²-1/8y²)要用简便计算 [(x+¼y)²+(x-¼y)²](2x²-1/8y²)刚刚题目打错了
计算:[(x+¼y)+(x-¼y)](2x²-1/8y²)
计算:[(x+¼y)+(x-¼y)](2x²-1/8y²)
要用简便计算
[(x+¼y)²+(x-¼y)²](2x²-1/8y²)
刚刚题目打错了

计算:[(x+¼y)+(x-¼y)](2x²-1/8y²)计算:[(x+¼y)+(x-¼y)](2x²-1/8y²)要用简便计算 [(x+¼y)²+(x-¼y)²](2x²-1/8y²)刚刚题目打错了
原式=2x( 2(x²-1/16 y²) )
=4x(x+1/4y)(x-1/4y)

4x^3-1/8x^2*y^2

原式=2x [2(x²-1/4y²)]
=4x(x+1/2y)(x-1/2y)