Question

) (x)2 – 81 =(x +9)*(_____)​

Answer 1

Answer:

(x-9)

Step-by-step explanation:

x²-81=(x)²-(9)²                  [i.e a²-b²=(a+b)(a-b)

so,x²-81=(x+9)(x-9)

Answer 2

Answer:

x=-88& (1). is the answer