Matrices question

NOTE:
Depending on the type of school your're in, handing in someone else's work could be considered cheating or plagerism and could get you kicked out!

However, to get you started:
Given the system of equations:

2x - 6y + 3z = -12
3x - 2y + 5z = -4
4x + 5y -2z = 10

The matrix equations are:

Please Login or Register  to view this content.

suppose you type in cells A1 thru C3 the following:

Please Login or Register  to view this content.

This is your matrix A

then in cell G1, say, enter the formula "=MDETERM(A1:C3)" to calculate the determinant of the matrix.

Next, for the inverse, you will select a range of nine cells, say, L1 thru N3.
Then, with those nine cells selected, type in the equation bar "=MINVERSE(A1:C3)" ---> press Ctrl + Shift + Enter.
notice that XL puts braces {} around the formula and that nine values (the inverse matrix) will be entered into the selected cells, etc. as a start........