Question

What is a11. A12. A21. A22

Answer 1

`a_(11) =-1\\a_(12) =3\\a_(21) =5\\a_(22) =3/2\\`

Explanation:

`2X-\left[\begin{array}{ccc}-4&8\\2&-2\end{array}\right] =\left[\begin{array}{ccc}2&-2\\8&5\end{array}\right]\\X=(1)/(2) (\left[\begin{array}{ccc}-4&8\\2&-2\end{array}\right] +\left[\begin{array}{ccc}2&-2\\8&5\end{array}\right])\\X=(1)/(2) (\left[\begin{array}{ccc}-4+2&8-2\\2+8&-2+5\end{array}\right] )\\X=(1)/(2) (\left[\begin{array}{ccc}-2&6\\10&3\end{array}\right] )\\X= (\left[\begin{array}{ccc}(1)/(2)(-2)&(1)/(2)(6)\\(1)/(2)(10)&(1)/(2)(3)\end{array}\right] )\\`

`X= (\left[\begin{array}{ccc}-1&3\\5&3/2\end{array}\right] )`

`a_(11) =-1\\a_(12) =3\\a_(21) =5\\a_(22) =3/2\\`