#1 Nope (9-5)m+(6-6) = 4m+0 = 4m
#2 ok
#3 Nope (6-9)h+(1+4) = -3h+5
#4 Nope (-7-(-5))w^2 + (-2-3)w + (-1-(-2)) = -2w^2-5w+1
You have a problem with subtraction?
1. (9m + 6) + (–5m – 6)
4m + 12
14m + 12
14m – 12
4m
2. (3r^2 + 7r + 1) + (4r^2 – 8r – 2)
7r2 + 15r – 1
7r2 – r – 1
7r2 – 15r – 3
–r2 – r – 1
3. (6h + 1) – (9h + 4)
–3h – 3
15h – 5
–3h + 3
–3h + 5
4. (–7w^2 – 2w – 1) – (–5w^2 + 3w – 2)
12w^2 + 5w + 1
–2w^2 – 5w – 1
–2w^2 – 5w + 1
–12w^2 – 5w – 3
My answers:
1. 14m + 12
2. 7r2 – r – 1
3. 15h – 5
4. –12w^2 – 5w – 3
1 answer