Question

can someone please help me? i will medal and fan!!

Answer 1

do it yourself retard

Answer 2

lolololol

Answer 3

@phi ?

Answer 4

you first set up 4 separate equations... between corresponding elements.

can you do that ?

Answer 5

um.. so one would be -12-w^2, and 2f*3 and 2k-81 and -14*3?

Answer 6

correspond elements means the top left "number" in the first matrix equals the top left number in the second matrix.
so, for example, the first equation is
-12 = 2k

can you do the others ?

Answer 7

oohh i think so.. so the second one would be -w^2 = -81, and the third would be 2f = -14 and the 4th would be 3 = 3?

Answer 8

yes. the last equation 3=3 does not have to be solved.

so you have 3 problems to figure out
-12 = 2k
-w^2 = -81
2f = -14

can you solve for k in the first equation ? I would divide both sides by 2

Answer 9

oh yup ok! i can solve these now, i just had no idea how to start it:) thanks so much!!:)

Answer 10

btw, for -w^2 = -81 you get
w^2 = 81
w= +9 or -9 (so w has two possible answers)

Answer 11

ooh, thanks!!:)