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Matrix Part 2.
Use determinant to solve a 2x2 Matrix.

1)The determinant of a 2x2 matrix A = ⎡⎢⎣abcd⎤⎥⎦ [ a b c d ] is |A| = ad - bc.
It is simply obtained by cross multiplying the elements starting from top left and then subtracting the products.
2) Then, solve for the unknown.

Differentiations of dy/dx w.r.t 'x'.

Simplifying the square roots of non perfect squares.

Finding the probability of a perfect square.

Simplifying an algebraic expression, also called simplifying a variable expression, means writing the expression in the most basic way possible by eliminating parentheses and combining like terms. Expanding an expression is done by eliminating the parentheses, generally by using the distributive property.

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Calculating the midpoints and coordinates of locations (points).

Resolving the interior angles of a regular polygon (Pentagon)

Simplifying square roots with exponents.

Fastest possible way to divide any number you can think of by 5.