I NEED THIS NOW! Please give the answer with a solution! (Solving Quadratic Equations by Extracting Square Roots)

1. 3x^2=13

2. 5x^2-18=0

thank you thank you

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18

Stephanie runs three days a week. she ran 3 2/3 miles on monday , 4 1/5 miles on wednesday , and 2 2/9 miles on friday. how many miles did she run this week ?

Andres wants to share 1/2 of his birthday cake with his friends. if he has 8 friends, how much of the cake will each friend recieve? draw a model to support your work (its ok if you cant)