SOLUTION: can you please help me solve this: factor {{{ 9x^2-64 }}} completly.

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: can you please help me solve this: factor {{{ 9x^2-64 }}} completly.      Log On


   

Question 189072: can you please help me solve this:
factor +9x%5E2-64+ completly.
Found 3 solutions by solver91311, nerdybill, stanbon:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


It is the difference of two squares:



and




John

Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
Because
+9x%5E2-64+
can be rewritten as:
+%283x%29%5E2-8%5E2+
(difference of squares)
we now have:
+%283x-8%29%283x%2B8%29+

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
solve this:
factor 9x^2-64 completely
-----------------------------
= (3x-8)*(3x+8)
===================
Cheers,
Stan H.