Question

Simplify this expression ASAP pls thank you!!

Answer 1

Answer:

Correct answer is option (b)

Step-by-step explanation:

USING IDENTITY a² - b² = (a+b)(a-b)

1 - a²/ a⁴ - 1 = - { (1 + a)(1 - a) / [1 - a²][1 + a²]  }

                   = - { (1 + a)(1 - a) /(1 + a)(1 - a) (1 + a²) }

                   = - {1/ 1 + a² }

∴ b) (1 - a²)/ (a⁴ - 1) = - (1/ 1 + a²) ⇒ ANSWER

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