Question

4x2 +9y2 = 40 and xy = 2. Find the value of 2x + 3y. Pls solve ​

Answer 1

Answer:

Step-by-step explanation:

4x² + 9y² = 40 .

xy = 2 .

Now, we know that ( a + b )² = a² + 2ab + b² .

So , ( 2x + 3y )² = ( 2x )² + ( 2.2x.3y ) + ( 3y )²

=> ( 2x + 3y )² = 4x² + 9y² + 12xy

Putting the values of 4x² + 9y² and xy , we get

( 2x + 3y )² = 40 + 12 * 2

=> ( 2x + 3y )² = 64 .

=> ( 2x + 3y ) = 8 . [ Answer ]

Hope it helps !!

Answer 2

Step-by-step explanation:

Answer will be 8. becuz x is 1 and y is 2