解方程组{x-2y-3/2=0,y=-1/4x^2

问题描述:

解方程组{x-2y-3/2=0,y=-1/4x^2
要有中间过程

把y=-1/4x^2代入x-2y-3/2=0
x-2*(-1/4x^2)-3/2=0
x^2/2+x-3/2=0
x1=-3 x2=1代入y=-1/4x^2
y1=-9/4 y2=-1/4