Question

Express (x square - 5 x + 7) ( X square + 5 x + 7) as the difference of two squares

Answer 1

Answer:

( x² + 7 )² - (5x)²

Step-by-step explanation:

    ( x² - 5x + 7 ) ( x² + 5x + 7 )

= ( ( x² + 7 ) - 5x ) ( ( x² + 7 ) + 5x )            [ this has the form (a-b)(a+b) ]

= ( x² + 7 )² - (5x)²

Hope this helps you out!