Question

if 2x+1/x=4 then 4x^2+1/x^2 is..??​

Answer 1

X+1/2x=4

X+1=4×2x

X+1=8x

1=8x-x

1=7x

1/7=x

2x+1/8x

2(1/7)/8(1/7)

(2/7)/(8/7)

2/8

1/4

Answer 2

Answer:

Step-by-step explanation:

2x + 1/x = 4

2x + 1 = 4x

1 = 4x - 2x

2x = 1

x = 1/2

Now,

4x^2 + 1 /x^2 = 4(1/2)^2 +1 /(1/2)^2

= 4(1/4) + 1 / (1/4)

= 1 + 1 /(1/4)

= 2/(1/4)

= 2*4

= 8 ans