Question

what must be added with a^+4 to make it a perfect square
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Answer 1

Step-by-step explanation:

a²+4=a²+2²

it is in the form a²+b² you must add 2ab to make it perfect square =a²+2ab+b² =(a+b)²

have to add 2×a×2=4a to make it perfect square

a²+4a+4 = (a+2)²