Thread: Matrix equation

Picture say all ik its easy but im stuck somehow:/

You can solve it with co factor expansion since we know that the determinant is going to be zero.

We then have

(1)*(x-x)-(x-1)(x^2-4)+(-1)(x^2-4) = 0 <=> x_1 = -2, x_2 = 0, x_3 = 2

Thats not how i shall solve it.. Factor is like next chapter they somehow solve this equation with that det

Can you specify how you are supposed to solve calculate the determinant?

Its the (2) the prob i get same but dont get -x^3

Originally Posted by Petrus

Its the (2) the prob i get same but dont get -x^3

Do you mean were

x+4(x-1)-x^2+4-x-x^2(x-1) = x+4x-4-x^2+4-x-x^3+x^2 = 4x-x^3

?

Just u type it made me solve it idk why but now i understand it!!! Ty alot