翻译，专业一点。。(二次型在高等代数学中占有非常重要的地位，二次型理论起源于解析几何学中二次曲线方
推荐回答（2个）
The two type occupies a very important position in higher algebra, two type theory originated in the analytic geometry in two times and two times the curve equation of curved surface equation is simplified to the standard form of matrix. In addition, a plane curve of degree two is a very important content in plane analytic geometry. The two type of theory can be displayed two equations corresponding algebraic feature with geometric feature two times curve. On the one hand, the two type can use contract transformation method and eigenvalue method to simplify the standard form, the corresponding curve, two times by the contract transformation and orthogonal transformation in general equation two for standard curve equation; on the other hand, the two type can be used to determine the shape of the two curves. Therefore, exploring the subject applied two times in two times in the curve is very important for the development of mathematics.
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