Question

find the products:

(x+9)(x-9) ​

Answer 1

Step-by-step explanation:

$helo..... \\ we \: know \: that = > \\ (a + b)(a - b) = {a}^{2} - {b}^{2}$

$(x + 9)(x - 9) \\ = {x}^{2} - 81 \\ \\ hope \: it \: helps \: uh..$

Answer 2

(x + 9)(x - 9) = x² - 81

Given :

The expression (x + 9)(x - 9)

To find :

The product

Formula :

a² - b² = ( a + b ) ( a - b )

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is

(x + 9)(x - 9)

Step 2 of 2 :

Find the product

We use the formula a² - b² = ( a + b ) ( a - b )

Thus we get

(x + 9)(x - 9)

= x² - 9²

= x² - 81

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