Solve each equation by taking square roots NEED THIS ASAP WILL GIVE BRAINLIEST

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

cutt.ly/XzW3SUN

Step-by-step explanation:

#3.

n x n - 5 = -4

n x n = 5 + -4

n x n = 1

n = 1

#5.

7x^2 + 1 = 29

7x^2 = 29 - 1

7x^2 = 28

x^2 = 28 / 7

x^2 = 4

x = 2

Hope that helps!

if x = 1, then the answer is 3.5