Im going crazy here please help me, i have tried to solve this but i dont know where to start.(adsbygoogle = window.adsbygoogle || []).push({});

1) Solve the following matrix equeations for a,b,c and d.

[tex]\left[\begin{array}{cc}a-b & b+c \\ 3d+c & 2a-4d\end{array}\right][/tex] = [tex]\left[\begin{array}{cc}8 & 1 \\ 7 & 6\end{array}\right][/tex]

this is another separate problem:

2)

a) show that if ad-bc [tex]\neq[/tex] 0, then the reduced row- echelon form of

[tex]\left[\begin{array}{cc}a & b \\ c & d\end{array}\right][/tex] is [tex]\left[\begin{array}{cc}1 & 0 \\ 0 & 1\end{array}\right][/tex]

b) Use part a) to show that the system

ax+by = k

cx+dy = l

has exactly one solution when ad-bc [tex]\neq[/tex] 0

thnx for any help i have started elementary algebra and everyone its in chapter 5 in the book and I am in the 1 chapter, but dont want to give up. the book of the course its

Elemtary linear algebra by Howard Anton and Chris Rorres. i dont know if its a good book. but i try to understand it, do you have any other suggestion of a great book for people like me....noob :(

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# Please help solving this

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