Please check my answers, which are at the bottom of each 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
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.
I've be told to times
but then I get confused when adding
please explain!
no worries...dad explained :)
thanks a lot
Let's go through each question step by step and check your answers:
a) 4(a+3) simplifies to 4a + 12
Your answer: 4a + 12
Correct!
b) 3(2b+2) simplifies to 6b + 6
Your answer: 6b + 2
Incorrect. The correct answer is 6b + 6.
c) 7(3c-1) simplifies to 21c - 7
Your answer: 21c - 7
Correct!
d) 5(2+d) simplifies to 10 + 5d
Your answer: 10 + 5d
Correct!
e) a(3a-6) simplifies to 3a^2 - 6a
Your answer: 4a - 6a
Incorrect. The correct answer is 3a^2 - 6a.
f) 2(x+y) does not simplify further
Your answer: 2x + 2y
Correct!
Moving on to the next set of questions:
a) a+a+a+a simplifies to 4a
Your answer: 4a
Correct!
b) a x a x a simplifies to a^3
Your answer: a^3
Correct!
c) a+b+a+b simplifies to 2a + 2b
Your answer: a^2 + b^2
Incorrect. The correct answer is 2a + 2b.
d) a^2 x a^3 simplifies to a^5
Your answer: a^5
Correct!
e) 3y+6z+2y-4z simplifies to 5y+2z
Your answer: 5y+10z OR 5y-2z
Correct! Both answers are valid.
f) c^2 + 2d + 3c^2 simplifies to 4c^2 + 2d
Your answer: 2d + 3c^4
Incorrect. The correct answer is 4c^2 + 2d.
Great job on most of the questions! If you have any further questions or need more clarification, feel free to ask.