tolong di bantu ya berserta caranya y

1) 28a^5b³ ÷ (-7a⁴)
= (-7a⁴)(-4ab³)
----------------------
(-7a⁴)
= (-4ab³)

2) 42x^7y^8z ÷ 6x³y²
= (6x³y²)(7x⁴y^6z)
---------------------------
(6x³y²)
= 7x⁴y^6z

3) - 32p^7q^8r⁴ ÷ 8pq^6r
= (8pq^6r)(-4p^6q²r³)
--------------------------------
( 8pq^6r)
= - 4p^6q²r³

4) - 72x^8y^9z^7 ÷ (-12x²y³z)
= (-12x²y³z)(6x^6y^6z^6)
-----------------------------------
(-12x²y³z)
= (6x^6y^6z^6)

5) (3y³ + 4y⁴)
--------------------
6y^5
= y³(3 + 4y)
------------------
y³(6y²)
= 3 + 4y
--------------
6y²