# SOLUTION: I don't understand how to solve and check the quadratic equation below by taking the square root of both sides. (a+5)^2=9 thank you

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 Question 513014: I don't understand how to solve and check the quadratic equation below by taking the square root of both sides. (a+5)^2=9 thank youAnswer by Maths68(1474)   (Show Source): You can put this solution on YOUR website!(a+5)^2=9 (a+5)^2=3^2 Take squre root of both sides sqrt((a+5)^2)=sqrt(3^2) sqrt((a+5)*(a+5))=sqrt(3*3) a+5=3 a=3-5 a=-2 Check (a+5)^2=9 Put the value of a in above equation (-2+5)^2=9 (3)^2=9 3*3=9 9=9