Question

B. If 3x – 2y = 8 and xy = 5, then the value of
9x2 + 4y2 will be:​

Answer 1

Answer:

124

Step-by-step explanation:

3x-2y=8

squaring on both sides

(3x-2y)²=64

9x²+4y²-12xy=64

9x²+4y²-12(5)=64

9x²+4y²-60=64

9x²+4y²=64+60=124