2007-01-11 15:26:24 · 5 answers · asked by odie_109 1 in Science & Mathematics ➔ Mathematics
If you are trying to factor this, it won't factor (unless you use imaginary numbers) . x^2 - 125 can be factored.
By the way, 125 is not 25^2
Any chance you meant x^3 + 125? That one can be factored into x^3 + 5^3 = (x + 5)(x^2 - 5x + 25)
Wow, Nick, great minds think alike.... :)
2007-01-11 15:34:10 · answer #1 · answered by Anonymous · 1⤊ 0⤋
25^2=625, not 125. You can't simplify x^2+125. If it was x^3+125, then you could simplify it to (x+5)(x^2-5x+25). Just in case you meant that.
2007-01-11 23:36:43 · answer #2 · answered by Nick R 4 · 2⤊ 0⤋
It really depends on what you're trying to do.
Simplify -> x^2 + 125 is the simplified form.
Factorise (real numbers) -> either form above will do, it can't be reduced further.
Factorise (complex numbers) -> (x + 25i) (x - 25i)
Solve equal to 0 (real numbers): discriminant is 0 - 4(1)(125) = -500 so there are no real solutions.
Solve equal to 0 (complex numbers): factorise as above, then either x + 25i = 0 or x - 25i = 0, so x = +/- 25i.
2007-01-11 23:33:56 · answer #3 · answered by Scarlet Manuka 7 · 0⤊ 1⤋
Question unclear.
2007-01-11 23:35:30 · answer #4 · answered by Anonymous · 1⤊ 0⤋
wut are you trying to do with this?
2007-01-11 23:30:35 · answer #5 · answered by batman123 2 · 1⤊ 0⤋