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murzikaleks [220]
4 years ago
14

(5x2 + 2x - 1) + (4x2-x-9)

Mathematics
1 answer:
natima [27]4 years ago
5 0

Answer:

5 {x}^{2}  + 2x - 1 + 4 {x}^{2}  - x - 9 \\ 5 {x}^{2}  + 4 {x}^{2}  + 2x  - x - 1 - 9 \\  = 9 {x}^{2}  + x - 10

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