Question

(x+7).(x-7)=



(x+4).(x-4)=



(x+5).(x-5)​

Answer 1

(x+7).(x-7)= x²-7x+7x - 49= x² - 49

(x+4).(x-4)= x²-4x+4x-16= x² - 16

(x+5).(x-5)= x²-5x+5x-25= x² - 25

Answer 2

(x+7).(x-7)=

x² - 7x + 7x - 49

x² - 49

(x+4).(x-4)=

x² - 4x + 4x - 16

x² - 16

(x+5).(x-5)

x² - 5x + 5x - 25

x² - 25