Not Really sure how to go about plotting this?

for x=0:0.01:6

y=x.^2+2*x-10 ;

if abs(y) <0.05 %Tolerance

fprintf('the root is %g \n' ,x)

break

end

end

Answer 1

[Image Analyst]

Try using roots() - the function meant for doing that:

x = linspace(-6, 6, 1000);
y = x.^2 + 2 * x - 10;
plot(x, y, 'b-', 'LineWidth', 2);
grid on;
r = roots([1,2,-10])
% Make black line for x axis;
yline(0, 'LineWidth', 2);
% Make vertical lines at roots
xline(r(1), 'LineWidth', 2, 'Color', 'r');
xline(r(2), 'LineWidth', 2, 'Color', 'r');
xlabel('x', 'FontSize', 18);
ylabel('t', 'FontSize', 18);
caption = sprintf('Roots at %.2f and %.2f', r(1), r(2));
title(caption, 'FontSize', 18);