Question

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

Answer 1

Answer:

30

Step-by-step explanation:

xy=6

y=6/x--------> 1)

Substitute this in the first equation.

you will get,

3x^2 - 12x+ 12=0

By solving this quadratic equation you will get x=2---------->2)

substitute this in equation 1)

we get,

y=6/2=3

Then substitute in equation 9x2 + 4y

= 18+4(3)=18+12

= 30

Answer 2

Step-by-step explanation:

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