Question

x²₋1₋2a₋a². factorise it

Answer 1

Answer:

 x²₋1₋2a₋a²

=x²-a²₋2a₋1

=x²-(a²+2a+1²)

=x²-(a+b)²

={x+(a+b)} {x-(a+b)}

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

Step-by-step explanation:Its factorized by using some formulas below:

Formula used in 4th line = (a+b)²=a²+2ab+b²

Formula used in 5th line = a²-b² = (a+b) (a-b)