Answer:
Step-by-step explanation:
(a²+7a–4) * (a–2) = (a²+7a–4)* a - (a²+7a–4) *2
= a²*a + 7a*a - 4*a - a²*2 - 7a *2 + 4 *2
= a³ +7a² - 4a - 2a² - 14a +8
= a³ + 5a² - 4a - 14a +8
= a³ + 5a² - 18a +8
a³ + 5a² - 18a +8 - (a³+4a²–29a+11) =a³ + 5a² - 18a +8 -a³- 4a²+29a - 11
= a² + 11a - 3
