Question 144899
{{{8x^2 + 10x - 3}}}
This is (4x-1)(2x+3)
You find this by "fumbling around" with it. We can see that the coefficients are 1 and 3, since they are they only factors of 3 (ignoring fractions).
So it's (?x   1) times (?x   3).  We can also see that either 1 or 3 is negative, but not both.
The 2 possible coeffs for the x are 2 and 4, or 8 and 1.
The result is several possibilities.  Change them around until you find the one that fits.