Use PEMDAS (Parentheses, Exponents, Multipy/Divide, Add/Subtract):

3 + (3 + 3) ÷ 2 x 5 - 3²
P: 3 + (6) ÷ 2 x 5 - 3²
E: 3 + 6 ÷ 2 x 5 - 9
MD: 3 + \( \frac{6}{2} \) x 5 - 9
MD: 3 + \( \frac{30}{2} \) - 9
AS: \( \frac{6}{2} \) + \( \frac{30}{2} \) - 9
AS: \( \frac{36}{2} \) - 9
AS: \( \frac{36 - 18}{2} \)
\( \frac{18}{2} \)
9

The factors of a number are all positive integers that divide evenly into the number. The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, 36.

To take the square root of a fraction, break the fraction into two separate roots then calculate the square root of the numerator and denominator separately:

\( \sqrt{\frac{9}{81}} \)
\( \frac{\sqrt{9}}{\sqrt{81}} \)
\( \frac{\sqrt{3^2}}{\sqrt{9^2}} \)
\(\frac{1}{3}\)

To divide terms with exponents, the base of both exponents must be the same. In this case they are so divide the coefficients and subtract the exponents:

\( \frac{-z^6}{3z^3} \)
\( \frac{-1}{3} \) z^{(6 - 3)}
-\(\frac{1}{3}\)z³

A factor is a positive integer that divides evenly into a given number. For example, the factors of 8 are 1, 2, 4, and 8.