Question

If 2x+3y=8and xy=4,then find value of 4x²+9x²​

Answer 1

refer to the attachment I hope it would help you.

thank you

Answer 2

2x+3y=8

=(2x+3y)²=8². (on squaring both sides)

=4x²+9y²+12xy=64

=4x²+9y²=64-48. (as. xy=4)

=4x²+9y²=16

hence , 4x²+9y²=16

hope this helps