matrices

[vivid ocean]

I need a solution to Q2 and Q3 please

And I would like an explanation how to get the answer please

[hearty meadow]

For q2 u need to find the matrix HH

[vivid ocean]

<@&791435371564892232>

How would I do Q3

[sacred basin]

do you know how to multiply a matrix by a scalar

[vivid ocean]

yes, but I dokt know how to get the scalar

[sacred basin]

what do you get when you add aA and bB?

[vivid ocean]

when I add A+ B =
1 0
0 -3/2

[sacred basin]

you need to multiply by the scalars a and b before adding the two matrices

[vivid ocean]

ohh shiit yeahhh

one sec

[vivid ocean]

I'm going to make an assumption: Once you times them by the scalar and added them, the identity 2x2 is (1 0 then 01), then we just equate the first number of the matrix by the first number of the identity matrix, and do the same for the next row, then we rearrange it and do a simultaneous equation to solve for a then substitute a back into equation to find b

That's what I thought of it so far

No idea if it's right or wrong

[sacred basin]

yeah, that's exactly right

[vivid ocean]

ohhhhhhh.....

how would I find the scalar, after I plugged it back into the matrix

[sacred basin]

what do you mean

[vivid ocean]

oh nvm, I was just being abit dumb

@sacred basin Tyvm, r u studying A-Levels?

[sacred basin]

no problem

i am

self-studied the course

doing my gcses now

[vivid ocean]

I seee, so you have pre-read A-Levels Maths?

[sacred basin]

i guess you could say that, yeah