Question

if 3 x + 2 y and x y is equal to 6 find the value of 9 x square + 4 y square​

Answer 1

Answer:

Step-by-step explanation:

Given,

3x+2y=12 , xy=6

(3x+2y)^2 =12^2

=9x^2+4y^2+12xy=144

ie, 9x^2+4y^2+(12×6)=144

=9x^2+4y^2+72=144

9x^2+4y^2=144-72

=72.

Answer 2

Step-by-step explanation:

Given,

3x+2y=12, xy=6

(3x+2y)^2=12^2

=9x^2+4y^2+12xy=144

ie,, 9x^2+4y^2+72=144

=9x^2+4y^2+72=144

9x^2+4y ^2=144-72

=72