tkhunny said:You simply MUST learn to recognize a "Difference of Squares".
25x^2 - 64 = (5x+8)(5x-8)
If all else fails, you can ALWAYS use the quadratic formula.
25x^2 + 0x - 64 ==> a = 25, b = 0, c = 64
No. That doesn't work. Both sum and difference of CUBES can be factored.la_nena26 said:is it the same if you are adding?
In future, please post new questions as new threads, not as replies to old questions where they may be overlooked (or answered incorrectly). Thank you.la_nena26 said:so if i got 16n^2+18n=0