Simple Matrix
4)a 4)C

Question

eric_d · Answer

anonymous · Answer

These are just simple ones..

anonymous · Answer

See, here I am giving you just general example:

$$\left[\begin{matrix}a & b \ c & d\end{matrix}\right]\left[\begin{matrix}e & f \ g & h\end{matrix}\right]\implies \left[\begin{matrix}ae + bg & ce + cg \ af + bh & af + dh\end{matrix}\right]$$

anonymous · Answer

Oh, thanks @hartnn  you are here..

anonymous · Answer

I have to go,it is urgent, just help @eric_d  and when I will come online next, I will carry it on.. :)

anonymous · Answer

There you are given with matrix A and B..

Just substitute the values in place of a,b,c,d,e,f,g,h and try to solve as I have done it above..

eric_d · Answer

ok

eric_d · Answer

what about 4)c)

hartnn · Answer

both 4a and 4c are of same type learn one, other is similar http://www.mathsisfun.com/algebra/matrix-multiplying.html

anonymous · Answer

It is about addition first and then multiplication.

You can add corresponding elements of matrix..

anonymous · Answer

$$\left[\begin{matrix}a & b \ c & d\end{matrix}\right] + \left[\begin{matrix}e & f \ g & h\end{matrix}\right]\implies  \left[\begin{matrix}a +e & b+f \ c + g & d + h\end{matrix}\right]$$

eric_d · Answer

Thanks @waterineyes  for the general examples.. and also @hartnn