(4a+____)²=16a²+8a+1

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(4a+____)²=16a²+8a+1(4a+____)²=16a²+8a+1(4a+____)²=16a²+8a+1+1

(4a+____)²=16a²+8a+1
(4a+____)²=16a²+8a+1

(4a+____)²=16a²+8a+1
+1