Question

If x +1/2x=4, then find x²+1/4x²

Answer 1

Step-by-step explanation:

x + 1/2x = 4

2x^2 +1 =

2x ^2 = 4-1 =3

x^2 = 3/2

the we have to find x^2 + 1/4x^2

3/2 + 1/(4*3/2)

= 3/2 + 1/(12/2 )

= 3/2 + 1/6

applying cross multiplication

= (18 + 2)/12

= 20/12

= 10 /6

Answer 2

Answer:

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