Please help me for the brainliest answer

1 answer:

6 0

Answer:

$n^2+3\\(n+1)^2$

Step-by-step explanation:

$n^2+3\\1^2+3=4\\2^2+3=7\\3^2+3=12$

$(n+1)^2\\(1+1)^2=4\\(2+1)^2=9\\(3+1)^2=16$

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