Question

if 2 x + 3 y is equal to 5 and xy equal to 1 find the value of 4 x square + 9 y square​

Answer 1

Answer:

$2x + 3y = 5 \: and \: xy = 1 \\ {(2x + 3y)}^{2} = {5}^{2} \\ {4x}^{2} + {9y}^{2} + 12xy = 25 \\ {4x}^{2} + {9y}^{2} + 12 \times 1 = 25 \\ {4x}^{2} + {9y}^{2} = 25 - 12 = 13$

Answer 2

Answer:

this is correct.....................