tolong yang jago matematika nomer 1 sampai 3

1).p/q × q/r = pq/qr = q/q×p/r = 1×p/r =p/r
2).x/y×y/z×z/p = xyz/yzp = x/p
3).2x+3/3 × 6x/4x²-9 = 12x²+18x/12x²-27
=3(4x²+6x)/3(4x²-9) = 4x²+6x/4x²-9 = 2x(2x+3)/(2x-3)(2x+3)
=2x/2x-3

1)
p/q × q/r = pq/qr = p/r

2)
x/y × y/z × z/p = xyz/yzp = x/p

3)
2x + 3..........6x
--------- × -------------
....3..........4x^2 - 9

...........12x^2 + 18x
= --------------------------
...3 × (2x - 3)(2x + 3)

...........6x(2x + 3)
= ---------------------------
....3 × (2x - 3)(2x + 3)

.......2x
= ----------
.....2x - 3