Question

Розкласти на множники

Answer 1

Объяснение:

1)

$7m {}^{2} - 7 = 7(m {}^{2} - 1) = (m - 1)(m + 1) = 7(m - 1)(m + 1)$

2)

$x {}^{3} - x = x(x {}^{2} - 1) = (x - 1)(x + 1) = x(x - 1)(x + 1)$

3)

$5a {}^{3} - 5a = 5(a {}^{3} - a) = a(a {}^{2} - 1) = (a - 1)(a + 1) = 5a(a - 1)(a + 1)$