Step-by-step explanation:

1.

Area of the rectangular swimming pool =length x width

216= (3w + 3) x w

216= 3w^2 + 3w

3w^2 + 3w - 216=0

3 (w^2 + w - 72)=0

w^2 + w - 72= 0

w^2 + (9-8)w-72=0

w^2 + 9w - 8w - 72=0

w (w+9)-8(w+9)=0

(w+9)(w-8)=0

So the two value of w are 8, -9

We take the positive value of rectangular swimming so we take w=8m

width =8m

length = 3 x 8 + 3

=24+3

=27m

2. not sure po haha

answer: kx=3(x-27)

(32+kx-13x+49)

kx-3x+81=0

3.

answer: x and x+2 are the integers

x(x+2)=528

x^2+2x=528

x^2+2x-528=0

4.

2mx + 2my - x - y {remove parenthesis)

(2mx + 2my) - (x+y)

(2m-1)(x+y)

so (2m-1) and (x+y)