Respuesta :

The question requires you to perform addition and subtraction the polynomial given;

[tex](-10x^2+9)\text{ +}(8x^2-5x\text{ +7})[/tex][tex]-10x^2+8x^2-5x+9+7^{}^{}[/tex]

after collecting the like terms, solve as;

[tex]-2x^2\text{ -5x + 16}[/tex]

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