1)y^2-3y-2 2)-6x^2+2x+13)x^4-13x^2+364)5x^3y-2x^y^2-xy^3
1个回答
1) [y-(3+√17)/2][y-(3-√17)/2]
3) (X^2-4)(X^2-9)=(X-2)(X+2)(X-3)(X+3)
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