Question

Выполни умножение: (u−5)(7u+1)(3u−7)

Answer 1

(u−5)(7u+1)(3u−7)
7u^2+u-35u-5(3u-7)
7u^2-34-15u+35
7u^2-49u+35

Answer 2

(u−5)(7u+1)(3u−7) = (7u²-35u+u-5)(3u−7) = (7u²-36u-5)(3u−7) = 21u³-108u-15u-49u²+252u+35 = 21u³-49u²+129u+35