Answer the following

Question

(a+6)(a^2-8a+8)=

Answer 1

Need to careful !!   Kevin is correct, William has an error...

 

6(-8a) = -48a   NOT -48a²

Answer 2

(a+6)(a^2-8a+8)

(a(a²) - a(8a) + a(8)) + (6(a²) - 6(8a) + 6(8))

a³ - 8a² + 8a + 6a² -48a + 48

a3 - 8a² + 6a²+ 8a  -48a + 48

a3 - 2a² -40a + 48

 

Answer 3

(a + 6)(a² - 8a + 8) = a³ -8a² + 8a +6a² - 48a² +48)= a³ +a²(-8 + 6 -48) + 8a + 48

 

= a³ -50a² +8a +48