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20-01-2022
Mathematics

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21-01-2022

Answer:

[tex]7 {x}^{2} + 5x - 12[/tex]

Step-by-step explanation:

[tex] {6x}^{2} + {x}^{2} + 5x - 3 - 9 \\ 7x ^{2} + 5x - 12 [/tex]

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