已知3x-2y=5求代数式【6x^4+(x^3-y)^2-(x^3+y)^2】÷(-2x)^3的值
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已知3x-2y=5求代数式【6x^4+(x^3-y)^2-(x^3+y)^2】÷(-2x)^3的值
![已知3x-2y=5求代数式【6x^4+(x^3-y)^2-(x^3+y)^2】÷(-2x)^3的值](/uploads/image/z/17146134-54-4.jpg?t=%E5%B7%B2%E7%9F%A53x-2y%3D5%E6%B1%82%E4%BB%A3%E6%95%B0%E5%BC%8F%E3%80%906x%5E4%2B%28x%5E3-y%29%5E2-%28x%5E3%2By%29%5E2%E3%80%91%C3%B7%28-2x%29%5E3%E7%9A%84%E5%80%BC)
【6x^4+(x^3-y)^2-(x^3+y)^2】÷(-2x)^3
=[6x^4+x^6-2x³y+y²-x^6-2x³y-y²]÷﹙-8x³﹚
=(6x^4-4x³y﹚÷﹙-8x³﹚
=-3/4x+1/2y
=-1/4(3x-2y)
=1/4×5
=-5/4
=[6x^4+x^6-2x³y+y²-x^6-2x³y-y²]÷﹙-8x³﹚
=(6x^4-4x³y﹚÷﹙-8x³﹚
=-3/4x+1/2y
=-1/4(3x-2y)
=1/4×5
=-5/4
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