Question

factorised form of r^2-10r+21 pls solve it by using identities and verified answer ​

Answer 1

Answer:

(r-7)(r-3)

Step-by-step explanation:

Factorised form of r2 – 10r + 21 is = r2 – 7r – 3r + 21 Take out the common factors, = r (r – 7) – 3 (r – 7) Again take out the common factor, = (r – 7) (r – 3)