cindyliu2014 cindyliu2014
  • 25-10-2022
  • Mathematics
contestada

Additional questions.
1. Factorise completely. (8)
(1) x² - y² + ax + ay
(2) a²-2ab+b²-c²
(3) 5(a+b)² +23(a²-b²)-10(a-b)²
(4)(a+b)²-4a-4b+3

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