数学学得好的进一、X^4-2x^2-8=?二、2X^2-7X+3=?三、X^2-3xy+2y^2=?四、5x^2+6xy-8y^2=?五、2x^2-xy-15y^2=?一定要做对,
<p>问题：数学学得好的进一、X^4-2x^2-8=?二、2X^2-7X+3=?三、X^2-3xy+2y^2=?四、5x^2+6xy-8y^2=?五、2x^2-xy-15y^2=?一定要做对,<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">崔德刚的回答：<div class="content-b">网友采纳 是分解因式吗? 1.x^4-2x^2-8=(x^2-4)(x^2+2)＝(x+2)(x-2)(x^2+2), 2.2X^2-7X+3=(2x-1)(x-3)=0, 3.X^2-3xy+2y^2=(x-2y)(x-y), 4.5x^2+6xy-8y^2=(5x-4y)(x+2y), 5.2x^2-xy-15y^2=(2x+5y)(x-3y).
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