Question

1 + 2ab - (a² +b²) factories​

Answer 1

Answer:1-2ab-(a²+b²)

=1-(2ab+a²+b²)

=1-(a+b)²

We know that x²-y²=(x-y)(x+y)

In the equation we got, x=1 and y=(a+b)

1²-(a+b)²=(1-a-b)(1+a+b)

Step-by-step explanation:

Answer 2

Answer:

3²

Step-by-step explanation:

Mark as a brainalist answer