Linear algebra questions

Hi I've just started university maths yesterday and been given this homework to do for Friday, only problem is I've just started and never tackled questions like this before. Help on solutions to these would be greatly appreciated thanks.

Hi I've just started university maths yesterday and been given this homework to do for Friday, only problem is I've just started and never tackled questions like this before. Help on solutions to these would be greatly appreciated thanks.

Have you done A-level maths? The first page at least is pretty standard A-level stuff.

Well I haven't studied further maths so there's slot of words and things in there that don't make sense

Such as? If you don't know a term then google it. If you don't understand the explanation online then ask here what it means.

Well I am asking otherwise I wouldn't be here, like on the second question I've got a positive 3bz instead of minus and not sure where it's gone wrong

Yeah positive z^2 and positive 9b^2

That's not right. You probably made one sign error when multiplying.

where about?