Question

If 3x - 4y = 10 and xy = -1 . Find the value of 9x^2 + 16y^2

Answer 1

Answer:

76

Step-by-step explanation:

(3x-4y)²=100

9x²+16y²-24xy=100

9x²+16y²=100+24xy

9x²+16y²=100+24x(-1)

9x²+16y²=100-24

9x²+16y²= 76