Question

[x+y][a+b]+[x-y][a+b]

Answer 1

(x+y) (a+b) + (x-y) (a+b)

ax + bx + ay + by + ax + bx - ay - by

ax + bx + ax + bx

2x(a+b)

Answer 2

✨✨✨

[x + y][a + b] + [x - y][a + b]

= ax + bx + ay + by + ax + bx - ay - by

= 2ax + 2bx

= 2x [a + b]

Here is your answer friend ☺☺☺

✨✨✨