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25-09-2020
Mathematics

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26-09-2020

Answer:

1

Step-by-step explanation:

[tex](-3x^2-7x+9)+(-5x^2+6x-4)\\(-3x^2+(-5x^2))+(-7x+6x)+(9+(-4))\\-8x^2-x+5[/tex]

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