solveing equation?

0 ⤊

x^-2=4

2007-10-14 03:49:46 · 4 answers · asked by sumguy 1 in Science & Mathematics ➔ Mathematics

4 answers

x^-2=4
This means that 1/(x^2) = 4
So we get 4x^2 =1
Simplify then factor
4x^2-1=0
(2x+1)(2x-1)=0
Divide by one factor then the other and solve
So x = + 1/2 and - 1/2

2007-10-14 03:52:24 · answer #1 · answered by ignoramus 7 · 0⤊ 0⤋

x=Â±2

2007-10-14 10:53:22 · answer #2 · answered by chasrmck 6 · 0⤊ 0⤋

x^-2=4

x^-2=1/x^2

1=4x^2

x^2= 1/4

so two roots x=+1/2 and x=-1/2

2007-10-14 10:59:40 · answer #3 · answered by maussy 7 · 0⤊ 0⤋

xsquared -2=4
xsquared=6
x =squareroot 6

2007-10-14 10:55:15 · answer #4 · answered by Jim J 5 · 0⤊ 0⤋