matlab画方程如何画出（x^2 + (9/4)y^2 + z^2 - 1)^3 - x^2z^3 - (9/80)y

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matlab画方程
如何画出（x^2 + (9/4)y^2 + z^2 - 1)^3 - x^2z^3 - (9/80)y^2z^3 = 0的图像啊.谢谢各位了

I did this before, so just give you the codes I wrote:
%%This file creates a 3-d red heart with an equation
[x,y,z]=meshgrid(linspace(-3,3,120));
f=(x.^2+(9*y.^2)./4+z.^2-1).^3-((9*y.^2).*(z.^3))./80-(x.^2).*(z.^3);
p=patch(isosurface(x,y,z,f,0));
set(p,'FaceColor','r')
grid on
daspect([1 1 1])
view(3)
camlight('right')
camlight('left')
camlight('headlight')
lighting phong
xlabel('X')
ylabel('Y')
zlabel('Z')
title('Heart of Math')

matlab画方程如何画出（x^2 + (9/4)y^2 + z^2 - 1)^3 - x^2z^3 - (9/80)y matlab如何画出下面的图像 (x^2+9/4*y^2+z^2-1)^3-x^2*z^3-9/80*y^2*z^3=0 如何用Matlab画出以下这个方程（x^2 + (9/4)*y^2 + z^2 - 1)^3 - x^2*z^3 - 用matlab 画(x^2 + (9/4)y^2 + z^2 - 1)^3 - x^2z^3 - (9/80)y^2z^ matlab如何画z=x^2+y^2,z 用MATLAB画出U=5x+4y+2z的图形条件为x+y+z=30；3x+y+z=50 解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y matlab 画 2*x^2+y^2+6*z^3-9*x*y+16*x*z-4*y*z=100的三维图像求救!用MATLAB怎么将以下表达式画出来?（x^2 + (9/4)y^2 + z^2 - 1)^3 - x^2z^3 3元1次方程x-2y=-9 3x-y+z=4{ y-z=3 { 2x+3y-z=122z+x=47 x+y+z=6 x*z/(20+x+y)=3; z/(20+x+y/2)=0.45; x*z /(x+20)=9; 请问此方程如何解 (x-2y+z)/9=(2x+y+3z)/10=-(3x+2y-4z)/3=1 连等,求x,y,z,