4a square+12ab+9b square
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Step-by-step explanation:
4a²+12ab+9b²
(2a)²+2(2a)(3b)+(3b)²
This is in the form of (x+y)²=x²+2xy+y²
so (2a)²+2(2a)(3b)+(3b)² can be written as (2a+3b)²
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