1.

I need help for this question anybody answer

Answer»

Answer:

0

Step-by-step explanation:

IMPORTANT FORMULA:

(a + B)³ = a³ + b³ + 3AB(a + b)

(a - b)³ = a³ - b³ - 3ab(a - b)

p = 2 - a

a³ + 6 ap + p³ - 8

= a³ + 6 a(2 - a) + (2 - a)³ - 8

= a³ + 12a - 6 a² + { 2³ - a³ - 3x2x a (2 - a)} - 8

= a³ + 12a - 6 a² + { 8 - a³ - 6 a (2 - a)} - 8

= a³ + 12a - 6 a² + { 8 - a³ - 12 a + 6a² } - 8

= a³ + 12a - 6 a² + 8 - a³ - 12 a + 6a² - 8

= a³ - a³ + 12a - 12a - 6a² + 6a² + 8 - 8

= 0

Hope it helps you.

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