Question

use suitable identity and find the product ( 5x - 3 ) ( 5x + 3 )

Answer 1

by identity 

$a^2 -b^2 =(a+b)(a-b)$
_____________________________

(5x-3)(5x+3)

$(5x)^2 -3^2$

25x^2 - 9

i hope this will help you


-by ABHAY

Answer 2

( 5x - 3 ) ( 5x + 3 ) = 25x² - 9

Given :

The expression ( 5x - 3 ) ( 5x + 3 )

To find :

The product using suitable identity

Formula :

a² - b² = ( a + b ) ( a - b )

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is ( 5x - 3 ) ( 5x + 3 )

Step 2 of 2 :

Find the product

We are aware of the algebraic identity that

a² - b² = ( a + b ) ( a - b )

Thus we get

$\sf (5x - 3)(5x + 3)$

$\sf = (5x + 3)(5x - 3)$

$\sf = {(5x)}^{2} - {(3)}^{2}$

$\sf = 25 {x}^{2} - 9$

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