Question

X+1.6Y(Y-X)=0.21+X+2.5(Y-X)=0.3

Answer 1

问：X+1.6Y(Y-X)=0.21+X+2.5(Y-X)=0.3

答：您好，这个是二元二次方程组，计算过程如下:

答：X+1.6Y(Y-X)=0.30.21+X+2.5(Y-X)=0.3由第二个式子可得:0.21+X+2.5Y-2.5X＝0.32.5Y-1.5X＝0.09Y＝0.6X+0.036

答：代入式子一，得:X+1.6×（0.6X+0.036）（0.6X+0.036-X）＝0.3

答：解得X1＝-2.14X2＝0.14

答：对应Y1＝-1.248Y2＝0.12

答：如果有不懂得地方可以随时咨询我。