Question

$\color{green}\boxed{QUESTION}$
4x² + 4x + 1 - a² + 8a - 16 Express it by difference between the two squares
$\color{red}\boxed{PLEASE \:NOTE !}$
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Answer 1

Step-by-step explanation:

(2x)²+2×2x×1+1²-(a²-2×a×4+4²)

(a+b)²=a²+2ab+b² and (a-b)²=a²+b²-2ab

so (2x+1)²-(a-4)²