Question

Factorize:
x²-81
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Answer 1

Answer:

$(x-9)(x+9)$

Step-by-step explanation:

Use the sum-product pattern

x²-81

x²+9x-9x-81

Common factor from the two pairs

x² +9x-9x-81

x(x+9)-9(x+9)

Rewrite in factored form

x(x+9)-9(x+9)

(x-9)(x+9)

Solution

(x-9)(x+9).

Answer 2

Answer:

QUESTION:

Factorize:x²-81

Since 81 is 9². We can write x²-81 as x²-9²

=(x²-9²)

=(x-9)(x+9)

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