Question

20) Subtract a - b from a + b the
result is
*
1) 2a+2b
2) 2a
3) 2b
4) 20- 2b

PLEASE MENTION THE EXPLANATION THEN I WILL MARK U AS BRAINLIEST....​

Answer 1

Answer:

2b

Step-by-step explanation:

(a+b)−(a−b)=a+b−a+b=a−a+b+b=2b.

Answer 2

Answer:

(a+b)(a-b)

Step-by-step explanation:

(a+b)-(a-b)

a(a-b)+b(a-b)

a²-ab+ab-b²

a²-b²

(a+b)(a-b)