History of Hindu Mathematics: A Source Book v2.c17.s16.30

v2.c17.s16.30

That is to say, suppose the equation to be $Mn²x² ± c = y²,1$ so that the multiplier (*i.e.*, coefficient of x²) is divisible by n². Putting nx = u, we get $Mu² ± c = y².2$ Then clearly the first root of (1) is equal to the first root of (2) divided by n. The corresponding second root will be the same for both the equations.