Question

if 2x + 1/3x = 5 , then 4x^2 + 1/9x^2​

Answer 1

Answer:

71/3

Step-by-step explanation:

We need 4x^2 + 1/(9x^2)

We can see here that on squaring (2x+1/3x)

we get 4x^2 +1/(9x^2) +2.2x/3x = 25

So 4x^2 + 1/(9x^2) = 25- (4/3)

= 71/3