Question

Which constant must be added and subtracted to solve the quadratic equation 9x2 + (3/4)X - root 2 by method of completimg square and WHY????

Answer 1

$\frac{ \frac{3}{4} }{2} = \frac{3}{8}$
we take middle term and divide by 2 , and 3/8 is added & sub. from eqn.