3xy(-2x)³(-1/4y²)²=
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3xy(-2x)³(-1/4y²)²=
3xy(-2x)³(-1/4y²)²=
3xy(-2x)³(-1/4y²)²=
3xy(-2x)³(-1/4y²)²
=3xy(-8x^3)(1/16y^4)
=-24x^4y*1/16y^4
=-3/2x^4y^5
3xy(-2x)³(-1/4y²)²
=3xy(-8x³)(1/16y^4)
=-3/2x^4y^5
3xy(-2x)³(-1/4y²)²
先定符号得
-3xy(2x)³(1/4y²)²
再定系数得
-3/2*xyx^3y^4
结果是
-3x^4y^5 /2