Question

Find the product of (x+1)(x-1)​

Answer 1

Answer:

∴ Required Product is (x² - 1)

Step-by-step explanation:

(x + 1)(x - 1)

=x*(x - 1) + 1*(x - 1)

=x*x - x*1 + 1*x - 1*1

=x² - x + x - 1

= x² - 1

∴ Required Product is (x² - 1)

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Answer 2

SOLUTION

TO DETERMINE

The product

$\sf{(x + 1)(x - 1)}$

EVALUATION

Here the given expression is

$\sf{(x + 1)(x - 1)}$

We are aware of the identity that

$\sf{ {a}^{2} - {b}^{2} = (a + b)(a - b)}$

We now apply the above identity

$\sf{(x + 1)(x - 1)}$

$\sf{ = {x}^{2} - {1}^{2} }$

$\sf{ = {x}^{2} - 1 }$

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