Tolong bantuin yg no 3,4,5,6,7 Makasih...

3) (t - 2)(2t - 3)
= (t.2t) + (-2.2t) + (-3.t) + (-2.-3)
= 2t² - 4t - 3t + 6
= 2t² - 7t + 6

4) (3p / 2) - (6p / 8)
= (3p . 8) - (6p . 2)
----------------------------
( 2 . 8 )
= 24p - 12p
-----------------
16
= 12p / 16
= ¾ p

5) 3p - 2q
= 3(2a² - 3a) - 2(4a - 5a²)
= 6a² - 9a - 8a + 5a²
= 6a² + 5a² - 9a - 8a
= 11a² - 17a

6) ( 5 / x + 3) - ( 6 / x + 4)
= 5(x + 4) - 6(x + 3)
-----------------------------
(x + 4)(x - 3)
= 5x + 20 - 6x - 18
----------------------------
(x + 4)(x - 3)
= - x - 2
-----------------------
x² + 4x - 3x - 12
= - x - 2
--------------------
x² + x - 12

7) 25 x²y = 5² . x² . y
30x²y = 2 . 3 . 5 . x² . y
kpk = 2 . 3 . 5² . x². y = 150x²y
FPB = 5 . x² . y = 5x²y