Question

Find 9x2+4y2 if 3x-2y=5,xy=2​

Answer 1

Answer:

Given,

3x−2y=5−−−−−−(1) and xy=4−−−−−(2)

squaring (1),

9x 2+4y2−12xy=25

using (2),

9x2+4y2

=25+12×4

=>73