Hitunglah perkalian al jabar 1.(8a - 5 ) (2a + 7) 2. (7p - 9) (6p + 8) 3. (9b +9) (7b - 8) 4. (-4x + 3) (2x -9)

NOMOR 1
(8a - 5)(2a + 7)
16a² + 56a - 10a - 35
16a² + 46a - 35

NOMOR 2
(7p - 9)(6p + 8)
42p² + 56p - 54p - 72
42p² + 2p - 72

NOMOR 3
(9b + 9)(7b - 8)
63b² - 72b + 63b - 72
63b² - 9b - 72

NOMOR 4
(-4x + 3)(2x - 9)
-8x² + 36x + 6x - 27
-8x² + 42x - 27

1.(8a-5)(2a+7)=16a²+56a-10a-35
                       =16a²+46a-35
2.(7p-9)(6p+8)=42p²+56p-54p-72
                       =42p²+2p-72
 3.(9b+9)(7b-8)=63b²-72p+63p-72
                        =63b²-9p-72
4.(-4x+3)(2x-9)=-8x²+36x+6x-27
                        =8x²+42x-27