Question

if x - 9y , xy = -3 , find the value of x² + 81y²​

Answer 1

Answer:

63

Step-by-step explanation:

$x ^{2} + 81y {}^{2} + 18xy = 9$

$x {}^{2} + 81y {}^{2} = 54 + 9 \\ = 63$