^2 means exponent to x
2007-12-15 16:15:31 · 6 answers · asked by diva 1 in Science & Mathematics ➔ Mathematics
x ² = 9
x = ± 3
2007-12-15 21:24:00 · answer #1 · answered by Como 7 · 2⤊ 1⤋
start off by dividing the equation by 5. then you're left with x^2=9. then you can take the square root of both sides. but be careful not to leave your answer as x=3. what about -3? (-3)^2 also equals 9.
2007-12-15 16:21:38 · answer #2 · answered by gabi 1 · 0⤊ 0⤋
5x^2 = 45; divide by 5
x^2 = 9; take square root
x = 3 (but don't forget negative root -3, as well)
2007-12-15 16:44:51 · answer #3 · answered by jimbob 6 · 0⤊ 0⤋
5x^2 = 45
x^2 = 9
x = -3, +3
2007-12-15 16:21:02 · answer #4 · answered by Anonymous · 0⤊ 1⤋
x^2 = 9
x = +/- 3
2007-12-15 16:19:29 · answer #5 · answered by norman 7 · 0⤊ 0⤋
dividing by 5 ...we ge...
x^2=9
=> x=+ 5,-5
2007-12-15 16:19:22 · answer #6 · answered by krishna t 2 · 0⤊ 2⤋