Question

rise:
(a + b)(x + y) + (2a + 3b)(x + y) - (3a + 4b)(x + y)

Answer 1

(a+b)(x+y) + (2a+3b)(x+y) - (3a+4b)(x+y)

=. [x+y] [ (a+b) + (2a+3b) - (3a+4b) ]

=. [x+y] [ a+b+2a+3b-3a-4b]

=. [x+y] [ a+2a-3a +3b+b-4b]

=. (x+y) × 0

= 0

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