Simplify square roots problem, please show work :)

3z^2 sqrt 6 * z

Step-by-step explanation:

Find the the factors of 72 in which one of them is a perfect square.

When square rooting variables take half of them when even numbers.

sqrt 6 * 9 * z^4 * z

3z^2 sqrt 6 * z

b. 2

step-by-step explanation:

the slope of a line =δy/δx

δy= y₂-y₁

δx= x₂-x₁

therefore, using the points (-2,-3)   and (3,7) we can calculate gradient as follows:

m=(7--3)/(3--2) (a number minus a negative number the sign changes to a plus)

m=(7+10)/(3+2)

=10/5

=2