Determine the justification for the steps from the derivation of the quadratic formula.
Justification of step A:
Justification of step B:

7200

aye bru this a great thing your doin here.

one fourth of 9% = 2.25%

gavin is correct in saying : the equivalent quarterly interest rate would be

2.25%.

there were a lot of them but the first one to pop up on a google search was bts