x^2-y^2+5x+3y+4分解因式,

huangjinxue9992022-10-04 11:39:542条回答

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徐兴明共回答了19个问题 | 采纳率94.7%: =[x(3x+5y)+y(5x+3y)][x(3x+5y)-y(5x+3y)] =(3x^2+5xy+5xy=(3x^2+10xy+3y^2)(3x^2-3y^2)提取公因式3 =3(3x^2+10xy+3y^2; 1年前

bike23 共回答了1976个问题 | 采纳率: x^2-y^2+5x+3y+4
=x²+5x+(5/2)²-y²+3y-(3/2)²-(5/2)²+(3/2)²+4
=(x+5/2)²-(y-3/2)²-25/4+9/4+4
=(x+5/2)²-(y-3/2)²
=(x+5/2+y-3/2)(x+5/2-y+3/2)
=(x+y+1)(x-y+4); 1年前

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