Question

1-a²+2ab-b² factorise the following​

Answer 1

Answer:

(a-b)²= a²+ b²-2ab

btw your question is wrong

Answer 2

1-a²+2ab-b² =0

1-(a²-2ab+b²)=0

1-(a²-b²)=0

1=(a²_b²)

1=0 or (a²_b²)=0