Question

if x=2t and y=
$2t - 1 \frac{3}{?}$
then the value of t when x=y​

Answer 1

Answer:

x=2t, y=t/3, x^2 – y^2 = ?

Per statement 1, t^2=9 ---> t= 3 or -3, after substituting both these values, you will get x^2 – y^2 = 35. Sufficient.

Per statement 2, t^3=-27 ---> t=-3, 1 value and hence you will get a unique value of x^2 – y^2. Sufficient

Answer 2

Answer:

x=2t, y=2t-1/3

if x=y,

then,

2t=2t-1/3

2t×3=2t-1

6t=2t-1

6t-2t=-1

4t=-1

t=-1/4

Therefore the required value of t=-1/4