Question

r²-10r+21 का गुणनखंडित रूप है​

Answer 1

Step-by-step explanation:

${r}^{2} - 10r + 21 \\ {r}^{2} - 7r - 3r + 21 \\ r(r - 7) + 3(r - 7) \\ (r - 7)(r + 3)$