y=x2-4x+1(-2<x<-1) y=x2+4x+1(-1<=x<=1) y=x2-4x+1(1<x<2).matlab

To plot this function in MATLAB, you can use the following code:

x1 = linspace(-2,-1); % generate x values for first interval
y1 = x1.^2 - 4*x1; % calculate corresponding y values
x2 = linspace(-1,1); % generate x values for second interval
y2 = x2.^2 + 4*x2; % calculate corresponding y values
x3 = linspace(1,2); % generate x values for third interval
y3 = x3.^2 - 4*x3; % calculate corresponding y values

% combine all x and y values
x = [x1 x2 x3];
y = [y1 y2 y3];

% plot the function
plot(x,y)
xlabel('x')
ylabel('y')
title('y = x^2 - 4x, for -2 < x < -1, -1 <= x <= 1, and 1 < x < 2')