Question 20Factorised form of r2−10r+21 isa) (r−1)(r−4)b) (r−7)(r−3)c) (r−7)(r+3)d) (r+7)(r+3)

Question 20Factorised form of r2−10r+21 isa) (r−1)(r−4)b) (r−7

1.	Question 20Factorised form of r2−10r+21 isa) (r−1)(r−4)b) (r−7)(r−3)c) (r−7)(r+3)d) (r+7)(r+3)
Answer» Question 20 Factorised form of $r^{2} - 10 r + 21$ is a) $(r - 1) (r - 4)$ b) $(r - 7) (r - 3)$ c) $(r - 7) (r + 3)$ d) $(r + 7) (r + 3)$