Question

F=G m₁ m₂ / d² is the mathematical form of Newton’s law of gravitation,
G - gravitational constant, m₁ m₂, are the masses of two bodies separated by a
distance d, then give the statement of Newton’s law of gravitation.

Answer 1

Newton's Law of Gravitation: 
Statement: According to this law, when two mass bodies are separated at finite distance then there must be an attractive force experience by them which is directly proportional to the product of their masses and inversely proportional to the square of their separation. 
Consider two mass bodies m1 & m2 be kept at distance d. Then the force of attraction F is given as 
                         $F \alpha m_{1} . m_{2}$
                               $F \alpha 1 / d^{2}$
Now, from above equations, we have 
                           $F \alpha \frac{ m_{1} m_{2} }{ d^{2} }$
or,                           $F = G \frac{ m_{1} m_{2} }{ d^{2}}$
Here         $G = 6.67 * 10^{-11} M m^{2} kg^{-2}$  is the universal gravitational constant.