Question

(2a+5b)^2 can you help me?
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Answer 1

(2a + 5b)^2 is the same as (a + b)^2 = a^2 + 2ab + b^2

Therefore:

(2a + 5b)^2 = 4a^2 + 20ab + 25b^2

Always remember to learn your identities. It is very important