Question

factorize: x²-81 please ​

Answer 1

Answer:

(x+9)(x-9)

Step-by-step explanation:

81 can be written as 9²

x²-9²=a²-b³=(a+b)(a-b)

(x+9)(x-9)

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Answer 2

Answer:

(x+9)(x-9)

Step-by-step explanation:

x square - 81 = (x) square - (9) square

we know that a square - b square = (a - b) (a + b)

so, according to that, x square - 81

=x square - 9 square = (x-9)(x+9)