Question

If 3x + 2y = 12 and xy = 6, find the value of 9x² + 4y².​

Answer 1

Answer:

x= 2

y= 3

xy= 6

Step-by-step explanation:

9x2=9(2)

= 18 (18)

=324

4y2=4(3)

=12(12)

=144

144+324

=468

Answer 2

Answer:

x=2,y=3

Step-by-step explanation:

Given:

3x + 2y = 12

xy = 6

x=6/y

subs in 3x+2y=12

3(6/y)+2y=12

18/y+2y=12

18+2y^2/y=12

2y^2-12y+18=0

y^2-6y+9=0

(y-3)(y-3)=0

y=3

subs y=3

3x+2(3)=12

3x+6=12

3x=6

x=2