Question

compute the value of 9 x 2 + 4 y2 if xy = 6 and 3x + 36 = k.​

Answer 1

Step-by-step explanation:

Consider the equation 3x + 2y = 12

Now, square both sides:

(3x + 2y)^2= 122

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

=>9x^2+ 4y^2= 144 – 12xy

since, xy = 6

9x^2+ 4y^2= 144 – 72

Thus, the value of 9x^2+ 4y^2= 72

Answer 2

Answer:

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