1) a3 + 8b3 2) x2y – 36 y3 3) -5 m2 + 10mn+5n2 4) - вопрос №1383223633521052442885658729339 от milayakisa1 09.08.2021 15:03

Question

Алгебра: 1) a3 + 8b3 2) x2y – 36 y3 3) -5 m2 + 10mn+5n2 4) 4ab – 28b + 8a – 56 5) a4 – 81

milayakisa1 · Answer

1) a^3 + 8b^3 = (a + 2b) • (a^2 - 2ab + 4b^2)
2) x^2y - 36y^3 = y • (x - 6y) • (x + 6y)
3) -5m2 + 10mn + 5n2 = -5 • (m^2 - 2mn - n^2)
4) 4ab - 28b + 8a - 56 = 4 (b + 2) • (a - 7)
5) a^4 - 81 = (a - 3) • (a + 3) • (a^2 + 9)

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