Question

Разложи многочлен r2 – 7r + 10 на множители.
(r + 5)(r + 2)
(r + 10)(r + 1)
(r – 5)(r – 2)
(r – 10)(r – 1)

Answer 1

$r^2-7r+10 = r^2-2r-5r+10 = r(r-2)-5(r-2) = (r-2)(r-5)$

$(r-2)(r-5)$ или $(r-5)(r-2)$

Answer 2

r² - 7r + 10

r² - 2r - 5r + 10

r × (r - 2) - 5 × (r - 2)

(r - 5) × (r - 2)