Question

If 4x - 3y = 18 and xy = 10, then find 16x^2 + 9y^2​

Answer 1

Answer:

564

Step-by-step explanation:

4x-3y =18

Squaring both sides

16x^2 + 9y^2 - 24xy = 324

16x^2 +9y^2 - 24*10 = 324 (because xy=10)

16x^2 + 9y^2 = 324+240 = 564