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in Factorization by (64.6k points)

Factorize each of the following algebraic expressions:

(a2 – 5a)2 – 36

1 Answer

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Best answer

As given,

(a2 – 5a)2 – 36

= (a2 – 5a)2 – 62

=  (a2 – 5a)2 – 62 = (a2 – 5a + 6) (a2 – 5a – 6)

= a2 -5a – 6

 = a2 + a – 6a – 6

= a (a + 1) -6(a + 1)

= (a – 6) (a + 1)

= a2 -5a + 6 

= a2 – 2a – 3a + 6

= a (a – 2) -3 (a – 2)

= (a – 3) (a – 2)

∴ (a2 – 5a)2 – 36 

= (a2 – 5a + 6) (a2 – 5a – 6)

= (a + 1) (a – 6) (a – 2) (a – 3)

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