Answer
$A=6x+22$
Work Step by Step
$A=(x+9)(x+3)-(x+5)(x+1)=x^2+12x+27-(x^2+6x+5)=6x+22$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.