Question

How to simplify (x+10)(x-10)​

Answer 1

Answer:

(a+b)(a-b)

a^2-b^2

x^2-100

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Answer 2

Given,

$\[\left( {x + 10} \right)\left( {x - 10} \right)\]$

Solution,

$\[ = \left( {x + 10} \right)\left( {x - 10} \right)\]$

$\[ = \left( {{x^2} - {{10}^2}} \right)\]$

$\[ = {x^2} - 100\]$

For calculating the value of x put this expression equal to zero.

$\[\begin{array}{l}{x^2} - 100 = 0\\ \Rightarrow {x^2} = 100\\ \Rightarrow x = \pm 10\end{array}\]$

Hence the value of x is $\[ \pm 10\]$