djshobha djshobha
  • 23-09-2020
  • Mathematics
contestada

factorize
a²-b²-20+1​

Respuesta :

haichoi0330
haichoi0330 haichoi0330
  • 23-09-2020

Answer:

(a+b)(a-b)-19

Step-by-step explanation:

a²-b²

=a²-ab+ab-b²

=a(a-b)+b(a-b)

=(a+b)(a-b)

it'll be more easy to understand if u try solving it the other way(from bottom to the top)

there fore... a²-b²=(a+b)(a-b)

and -20+1=-19

so then the ans will be(a+b)(a-b)-19

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