के रत 12:19%, W x:y=?£ a\

1.	के रत 12:19%, W x:y=?£ a\
Answer» If a : b = c : d then a, b , c ,d are in proportion. a × d = b × d or Product of extremes = product of means Now , ( 4x² - 3y²) : ( 2x² + 5y² ) = 12 : 19 ( 4x² - 3y² ) 19 = ( 2x² + 5y² )12 76x² - 57y² = 24x² + 60y² 76x² - 24x² = 60y² +57y² 52x² = 117y² x² / y² = 117 / 52 ( x/ y )² = ( 13 × 9 ) / ( 13 × 4 ) = 9 / 4 ( x / y )² = ( 3 / 2 )² Therefore , x / y = 3 / 2 x : y = 3 : 2 Like my answer if you find it useful!

Answer»

If a : b = c : d then a, b , c ,d are in

proportion.

a × d = b × d

Product of extremes = product of means

Now ,

( 4x² - 3y²) : ( 2x² + 5y² ) = 12 : 19

( 4x² - 3y² ) 19 = ( 2x² + 5y² )12

76x² - 57y² = 24x² + 60y²

76x² - 24x² = 60y² +57y²

52x² = 117y²

x² / y² = 117 / 52

( x/ y )² = ( 13 × 9 ) / ( 13 × 4 )

= 9 / 4

( x / y )² = ( 3 / 2 )²

Therefore ,

x / y = 3 / 2

x : y = 3 : 2

Like my answer if you find it useful!

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