Question

expand( a+2b+5c)² by using identity
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Answer 1

by using the formula( a + b + c) whole square equals to a square + b square + c square +2AB+ 2BC + 2 CA

Answer 2

Step-by-step explanation:

first take a+ 2b as p and 5c as q. now you can split the formula in (a+b )^2