One way is factor exg if you wanted to find the square root of 36 you would factor 36=2 times 2 times 3 times 3 then group repeeting numbers then write only one of them 36=(2 times 2) times (3 times 3) squareroot36=2 times 3=6
so factor 65 65=5 times 13 that doesn't help next step find squares close to that numbers 1^2=1 2^2=4 3^2=9 4^2=16 5^2=25 6^2=36 7^2=49 8^2=64 9^2=81
the answer is a little more than 8 the more exact one would be from a calculator (8.0622577482985)
