Question

can i have some help? http://prntscr.com/3anf6j

Answer 1

i iwsh i new how D: whats these math problems called ill search it

Answer 2

Well, we can see easily IF it has an inverse. If it's determinant is zero, it's singular.

There's a formula to calculate the inverse.

Answer 3

Odd problem!! First it asks you whether or not the matrix has an inverse, and then it gives you four possible choices for the inverse!!
If you're willing to look this up online, Google "inverse of a 2x2 matrix."

Answer 4

http://mathworld.wolfram.com/MatrixInverse.html

Answer 5

can i just have a simplified way of doing this?

Answer 6

The formula is the simplest way that I know to do it by hand. Computers can do the inverse, if you need an even easier way.

Answer 7

Sorry, no. :( You truly do need to understand how to find matrix inverses. Inverses of 2x2 matrices are the easiest. There's a formula, as @vandreigan has pointed out.

Look through

https://www.google.com/search?q=inverse+of+a+2x2+matrix&rlz=1C1CHFX_enUS461US461&oq=inverse+of+a+2x2+matrix&aqs=chrome..69i57j0l5.4119j0j7&sourceid=chrome&es_sm=122&ie=UTF-8

and choose the reference that's easiest for you to undrstand.

Answer 8

Ok i think i got it! is the correct answer b?

Answer 9

I haven't actually done the problem. However, you could check your own "inverse" by multiplying it by the original matrix. IF you are right, you will get this result (called the "identity matrix:"

Answer 10

(Really!)

Answer 11

Hmm ok thanks mathmale :)