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klemol [59]
3 years ago
9

Please help!.......

Mathematics
1 answer:
larisa86 [58]3 years ago
4 0
(f+g) means add the expressions together. combine like terms.
5 {x}^{2}  + 3 {x}^{2}  = 8 {x}^{2}
- 2x + x =  - x
there is no other constant term so the -4 stays as is.
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