Question

(x+9) (x-9) answer X2 - 81​

Answer 1

Answer:

Given

(x+9)(x–9)

Step-by-step explanation:

it is in the form of (a+b)(a–b)

we know that (a+b)(a–b) = a²–b²

a=x and b= 9

(x+9)(x–9) = x² –9²

= x²– 81

Hence it is a required equation