1.

Find the determinant of the matrix A= ( begin{bmatrix}1&x&y 1&x&-y 1&-x^2&y^2 end{bmatrix} ).

A. (x+1)
B. -2xy(x+1)
C. xy(x+1)
D. 2xy(x+1)
Answer» C. xy(x+1)


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