plz answer fast and fast plz
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Answer:
a. 4c^2+4cd+d^2
Step-by-step explanation:
by using formula (a+b)^2 we can solve these problem
(a+b)^2=a^2+2ab+b^2
take a=2c
b=d
a^2=(2c)^2=4c^2
b^2=d^2
2ab=2(2c)(d) =4cd
therefore, full answer is
4c^2+4cd+d^2
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