Question

splitting middle term.Pls help me ​

Answer 1

a² - 7a - 120

= a² - 15a + 8a - 120

= a(a - 15) + 8(a - 15)

= (a - 15)(a + 8).

Answer 2

$a {}^{2} - 7a - 120$

${a}^{2} + 8a - 15a - 120$

$a(a + 8) - 15(a + 8)$

$(a + 8)(a - 15)$