(1 point) suppose that the trace of a 2×22×2 matrix aa is tr(a)=−4tr(a)=−4, and the determinant is det(a)=0det(a)=0. find the eigenvalues of aa.

Suppose



with and . We can find the eigenvalues of in the usual way, by taking the determinant of and setting it equal to 0.



and we observe that the characteristic polynomial has linear coefficient and constant coefficient . Thus in this case we have the characteristic polynomial equation,

Do the math. she originally had 50 dollars on her gift card and she had 12 dollars left on her gift card after she finished her shopping spree. if you subtract 50 minus 12 you get thirty eight dollars as your answer. so therefore, ciara spent 38 dollars total o