Question

if 9x2+25y2 =181 and xy =6 find 4x2+9xy2​

Answer 1

9x² + 25y² = 181 & xy = 6

(3x)² + (5y)² +2(3x * 5y) =181 +(30*6)

(3x + 5y)² = 361

3x + 5y = 19

By solving, we get :- x= (-2), y = 5

So 4x² + 9xy² = 4*(-2)² + 9*[(-2)(5)²]

= 16 - 450 = 434...

Hope it will help you....

Answer 2

Answer:

434 is the answer hope it helps you