exam Maths Puzzle Numerical Ability

If A is a square matrix with the property (A with an exponet of 2) = 0, show that (I - A)inverse = A + I.

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exam Other Question

2 divided by y2=y-6 plus 3y divided by y2-2y-15 Find the center, foci, vertices, and co-vertices

{{{ (x+1)^2/4 + y^2/1 =1 }}}

And {{{ 16(x+1)^2 + 9(y-1)^2 =144 }}}