2007-11-21 16:48:30 · 6 answers · asked by remote control 1 in Science & Mathematics ➔ Mathematics
In math exponents take precedence, so what you are saying the same as:
-1 * x² = 4
If you divide both sides by -1, you get:
x² = -4
Take the square root of both sides and you have:
x = sqrt(-4)
x = sqrt(4) * sqrt(-1)
x = ±2i
2007-11-21 16:52:45 · answer #1 · answered by Puzzling 7 · 1⤊ 0⤋
2
2007-11-21 21:12:05 · answer #2 · answered by catsfanj 3 · 0⤊ 0⤋
x = 2
2007-11-21 16:51:34 · answer #3 · answered by yp 3 · 1⤊ 1⤋
it depends on what level of math you are taking.
x^2= - 4
In highschool math, you would not be able to solve this problem because you're told you can't take the square root of a negative number.
However, in higher level math you deal with "imaginary numbers" and the answer would be + 2i and -2i.
where i^2 = -1
2007-11-21 16:55:49 · answer #4 · answered by Anonymous · 1⤊ 0⤋
Puzzling is absolutely right!
2007-11-21 16:54:36 · answer #5 · answered by Deee 3 · 0⤊ 0⤋
-x^(2)=4
x^(2)=-4
x = 2i
2007-11-21 16:55:09 · answer #6 · answered by bustedtaillights 4 · 0⤊ 0⤋