Question

If 49x^2-b=(7x 1/2)(7x-1/2).Then find b

Answer 1

Hi ,

49x² - b = ( 7x + 1/2 )( 7x - 1/2 )

( 7x )² - b = ( 7x )² - ( 1/2 )²

compare both sides of the equation,

b = ( 1/2 )²

b = 1/4

I hope this helps you.

: )