aljabarkanlah dengan caranya a.(x + 5) (x - 5)= b.(x - 7) (x + 7)= c.(2a + b) (b - 3)= d.(x - 11) (3x + 9)= e(5a + 5) (7b + 7)=

semoga membantu yaaa

Mapel : Matematika
Bab : Menyederhanakan Bentuk Aljabar

A]
(x + 5) (x - 5)
= x (x - 5) + 5 (x - 5)
= x² - 5x + 5x - 25
= x² - 25

B]
(x - 7) (x + 7)
= x (x + 7) - 7 (x + 7)
= x² + 7x - 7x - 49
= x² - 49

C]
(2a + b) (b - 3)
= 2a (b - 3) + b ( b - 3)
= 2ab - 6a + b² - 3b

D]
(x - 11) (3x + 9)
= x (3x + 9) - 11 (3x + 9)
= 3x² + 9x - 33x - 99
= 3x² - 24x - 99

E]
(5a + 5) (7b + 7)
= 5a (7b + 7) + 5 (7b + 7)
= 35ab + 35a + 35b + 35