Question

(13+x)(13-x) how to do expansion of it

Answer 1

Hello here is your answer by Sujeet yaduvanshi ☝☝☝☝


Step:-1
multiply 13 into (13-x)
Step:-2

multiply +x into. (13-x)

solution:-

13(13-x)+x(13-x)

169-13x+13x-x²

Arrange in particular form

-x²+169


As well as written

169-x²


that's all

Answer 2

Hey there!

Given ( 13 + x) ( 13 - x) is in the form of ( a + b) ( a - b)

So , ( a + b) ( a - b)

= a ( a + b ) - b ( a + b)

= a² + ab - ab - b²

= a² - b²

Now,

( 13 + x) ( 13 - x)

= ( 13² - x²)

= 169 - x²

Hope helped!