Question

if x= 3+1/2
then find the value of
x square + 3x cube/8x square

Answer 1

 x= 3+1/2=3.5
(x²+3x³)/8x²
=[(3.5)²+{3(3.5)³}]/8(3.5)²
=[12.25+{128.625}]/98
=1.4375(ans)

Answer 2

Solving the value of x (to make it simple for calculation)
x=3+1/2
=6+1/2
=7/2

Now solving the above given equation by equating the value of x in it,
=x²+3x³/8x²
=(7/2)²+3(7/2)³/8*(7/2)²
Now solving it further,
We get,
=49/4+3*(343/8)/8*(49/4)
=49/4+1029/8*98
Now taking the LCM of the equation we get,
LCM=784

=(49*196+1029)/784
=10633/784
=13.5625

Hence, the value after solving the equation is 13.5625