Respuesta :

amna04352

Answer:

10r² + 8r + 7

Step-by-step explanation:

(10r³-22r²-17r-21)/(r-3)

(10r³-30r²+8r²-24r+7r-21)/(r-3)

[10r²(r-3) + 8r(r-3) + 7(r-3)]/(r-3)

10r² + 8r + 7