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vitfil [10]
3 years ago
15

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

Mathematics
1 answer:
Anastasy [175]3 years ago
7 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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Step-by-step explanation:

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