Question

factorise b square -121​

Answer 1

Answer:

(b + 11) (b - 11)

Step-by-step explanation:

b² - 121 = b² - 11²

Using x² - y² = (x + y) (x - y)

⇒ b² - 121 = b² - 11² =(b + 11) (b - 11)

Answer 2

Answer:

b=11

Step-by-step explanation:

b^2-121=0

b^2=121

b= root 121

b= 11

Hope it will help you

Mark me as brainliest