Question

Incorrect Question 9 0/1 pts A numerical algorithm is used to solve the following system of equations: x1 - x2 = 2 -2x1 + 5x2 = -1 The numerical results are x1 = 2.98 and x2 = 1.03. The Euclidean norm of the residuals is (to four decimal places): 0.0361

MATLAB Coding

Please state the right answer and give a little explanation why it's the right answer.

Answer 1

1)

Euclidean norm is 0.1965

clc
clear all
close all
A=[1,-1;-2,5];
b=[2;-1];
x=[2.98;1.03];
disp('Euclidean norm is')
N=norm(A*x-b,2);
fprintf('Euclidean norm is %.4f\n',N);