my answer is 15 0r -15
2007-11-29 15:00:33 · 7 answers · asked by thonia 1 in Science & Mathematics ➔ Mathematics
sqrt of negative number is imaginary number
sqrt(-225)=i*sqrt(225)=i*15=15i
2007-11-29 15:04:29 · answer #1 · answered by RickSus R 5 · 1⤊ 0⤋
Since 225 is negative, it has an "imaginary" answer. So, the square root of 225 is 15i, where "i" stands for imaginary.
2007-11-29 23:15:14 · answer #2 · answered by Anonymous · 0⤊ 0⤋
15 is correct but u would need a + and a - to make it - and u cant do dat so the correct answer would be 15i bcuz the number is imaginary
2007-11-29 23:06:48 · answer #3 · answered by Claudia S 1 · 0⤊ 0⤋
â(- 225) = â (225 i ²) = ± 15 i
2007-11-30 05:02:50 · answer #4 · answered by Como 7 · 2⤊ 1⤋
sqrt(-225) = sqrt (225 * -1 )
=sqrt (225) * sqrt (-1)
=15 * i
=15i
15 & -15 are wrong answers my dear.
2007-11-29 23:14:08 · answer #5 · answered by Angel 2 · 0⤊ 0⤋
you can't do the root of a negative number unless you use imaginary numbers (i)
2007-11-29 23:05:20 · answer #6 · answered by hmmm 2 · 1⤊ 0⤋
+15i or -15i
ok thanks
2007-11-29 23:34:10 · answer #7 · answered by sanjeewa 4 · 0⤊ 0⤋