Question

please solve this questions with step by step​

Answer 1

Your Question:

(a+1) (a-1) (a²+1) = ?

(a) a⁴ - 2a² - 1

(b) a⁴ - a² - 1

(c) a⁴ - 1

(d) a⁴ + 1

Answer:

(c) a⁴ - 1 is your correct answer.....

Step by step solution:

(a+1) (a-1) (a²+1)

[a(a-1)+1(a-1)] (a²+1)

(a² - a + a - 1) (a²+1)

(a² - 1) (a²+1)

( a²) ² - (1) ² _______[1]

[ since, (a+b) (a-b) = (a) ²- (b²) ]

.......from [1]

a⁴-1

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