$x_1^2-x_2^2+2x_2=1$

$x_1^2+2x_1+x_2=5$

When the tolerance value is ${10}^{-9},$ the maximum number of iterations is $100,$ and the initial guess is $x0=[0\mathrm{.}5$;$0\mathrm{.}8],$ find the number of iterations made by the

Matlab program to solve the system using the Newton's method.

Your answer:

$11$

$8$

None

$10$

$9$