Question

if x+2y=9 and xy=7, find the value of x^2+4y^2

Answer 1

Answer:

53

Though there are 2 values the final answer is same

There are two values for x asa well as y

When x = 2 , y = 7/2

When x = 7 , y = 1

Step-by-step explanation:

For solution and steps please refer the attachment

Answer 2

Answer:

53

Step-by-step explanation:

x+2y=9

x^2 + 4y^2 + 4*xy=81

x^2 + 4y^2 + 28=81

x^2+ 4y^2= 53