1.

Factorise : a²-b²-2bc-c²

Answer» DEAR friend,
Here's your answer...
=a² - b² - 2BC - c²
=a² - ( b² + 2bc + c² )
= a² - ( B + c )², By using a² + 2AB + b² = (a + b)²
=( a + b + c ) ( a + b + c ), By a² - b² = (a+b) (a-b)
Hope it helps you!!
PLEASE mark my answer as brainliest!


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