Question

$(4x - 5y) + (4x + 5y)$
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Answer 1

Step-by-step explanation:

4x-5y+(4x+5y)

4x+4x-5y+5y

8x

Answer 2

Answer:

$(4x - 5y) + (4x + 5y) \\ (4x) ^{2} + (5y) ^{2} \\ 16x ^{2} + 25y ^{2}$