2x + 3y -এর বর্গ কত ?
A 4x2 +12xy+9y
B 4x+12xy+9y2
C 4x2 +12x+9y2
D 4x2 +12xy+9y2
Correct Answer: Option D
(2x+3y)2
=(2x)2 +2.2x.3y+(3y)2 = 4x2 +12xy+9y2
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