( i + i ) ² = ?
Answer= 2i
2006-11-07 18:03:27 · 8 answers · asked by gn02622015 1 in Science & Mathematics ➔ Mathematics
-4
2006-11-07 18:26:40 · answer #1 · answered by Naveen 2 · 0⤊ 0⤋
(1 + i)^2 = 1 + 2i - 1 = 2i
2006-11-08 02:34:19 · answer #2 · answered by Dr. J. 6 · 0⤊ 0⤋
(1 + i)^2 = 1 + 2i - 1 = 2i
Get your teacher to show you phasors. Raising a complex number to a power is similar to a rotation in the complex plane.
2006-11-08 02:28:22 · answer #3 · answered by Anonymous · 0⤊ 0⤋
i think the question will be (1+i)^2 only then will it be 2i
as 1+i^2+2i = 1-1+2i = 2i
2006-11-08 02:06:50 · answer #4 · answered by yog 2 · 1⤊ 0⤋
(1+i)^2=1+2i+(i)^2
1+2i-1=2i
2006-11-08 02:13:31 · answer #5 · answered by raj 7 · 0⤊ 0⤋
Yeah, what yog said!
( i + i ) ² = -1 -1 -1 - 1 = -4
( 1 + i ) ² = 1 + i + i - 1 = 2i
2006-11-08 02:11:39 · answer #6 · answered by Helmut 7 · 0⤊ 0⤋
(i+i)²
= (2i)²
= 2²x-1
= -4
This is not 2i because i is the squareroot of -1 not just -1.
2006-11-08 04:58:31 · answer #7 · answered by Jay 4 · 0⤊ 0⤋
nope.You forgot to square.
( i + i ) ² =(2i)^2=-4
2006-11-08 02:18:23 · answer #8 · answered by yupchagee 7 · 0⤊ 0⤋