Question

If 16x² + 8y² = 9 and xy= -√2/9 find the value of 4x - 2√2y

Answer 1

Answer:

√97/3

Step-by-step explanation:

let P = 4x - 2√2y

p² = ( 4x - 2√2y  )² = 16x² + 8y² - 16√2xy = 9 + 16√2×√2/9

   = 9 + 16/9 = 97/9

P = √97/3