Please check my answers, which are at the bottom of each question...:)

Question

remove brackets
a) 4(a+3) d) 5(2+d)
4a+12 10+5d

b) 3(2b+2) e) a(3a-6)
6b+2 4a-6a

c) 7(3c-1) f) 2(x+y)
21c-7 2x+2y

simplify the following:

a) a+a+a+a d) a2 xa3
4a a5

b) a x a x a e) 3y+6z+2y-4z
a3 5y+10z OR 5y-2z

c) a+b+a+b f) c2+2d+3c2
a2 +b2 2d+3c4

Answer 1

b) 6b+6
e) 3a^2 - 6a

b) 5y+2z
c) 2a+2b
f) 4c^2+2d

Looks like some review is in order, eh? Looks like you're getting "+" and "x" mixed up. or you have copied the problems wrong.

Answer 2

I've be told to times
but then I get confused when adding

please explain!

Answer 3

no worries...dad explained :)
thanks a lot