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-7i is a purely imaginary number in the complex number system, where "i" represents the imaginary unit, defined as the square root of -1. It can be expressed in the form a + bi, where a is the real part (0 in this case) and b is the imaginary part (-7). This number lies on the imaginary axis of the complex plane, indicating it has no real component.
What else can I help you with?
What is x2 plus 49?
x2 + 49 = x2 - (-49) = x2 - (-1)(49) = x2 - (i2)(72) = x2 - (7i)2 = (x - 7i)(x + 7i) where i is the imaginary square root of -1.
What is the answers to 5 - 7i 2 - 5i?
To solve ( (5 - 7i) + (2 - 5i) ), you combine the real and imaginary parts separately. The real part is ( 5 + 2 = 7 ), and the imaginary part is ( -7i - 5i = -12i ). Therefore, the answer is ( 7 - 12i ).
What is the complex conjugate of a plus bi?
The complex conjugate of a+bi is a-bi. This is written as z* where z is a complex number. ex. z = a+bi z* = a-bi r = 3+12i r* = 3-12i s = 5-6i s* = 5+6i t = -3+7i = 7i-3 t* = -3-7i = -(3+7i)
How do you simplify i plus 6i?
answer is 7i, since its the same thing as: i + (i + i + i + i + i + i)
Which choice is equivalent to the square root of -49?
The square root of -49 can be expressed using imaginary numbers. Specifically, it is equivalent to 7i, where "i" represents the imaginary unit defined as the square root of -1. Thus, the answer is 7i.
What is the complex conjugate of -5 plus 7i?
-5 - 7i
Find the conjugate of -4-7i?
It is -4+7i or +4-7i. All that is required is to change one of the signs, it does not matter which.
What is the square root of -49 in a bi form?
[ 0 + 7i ] and [ 0 - 7i ] is.
What is the absolute value of 7i?
The absolute value is sqrt(72 + 12) = sqrt(49 + 1) = sqrt(50) or 5*sqrt(2) = 7.071 approx.
What is x2 plus 49?
x2 + 49 = x2 - (-49) = x2 - (-1)(49) = x2 - (i2)(72) = x2 - (7i)2 = (x - 7i)(x + 7i) where i is the imaginary square root of -1.
What is the complex conjugate of a plus bi?
The complex conjugate of a+bi is a-bi. This is written as z* where z is a complex number. ex. z = a+bi z* = a-bi r = 3+12i r* = 3-12i s = 5-6i s* = 5+6i t = -3+7i = 7i-3 t* = -3-7i = -(3+7i)
How do you simplify i plus 6i?
answer is 7i, since its the same thing as: i + (i + i + i + i + i + i)
What is the quadratic equation with solutions of 7i?
x2 + 49 = 0
What does -7 divided by 3i equal?
-10
Which choice is equivalent to the square root of -49?
The square root of -49 can be expressed using imaginary numbers. Specifically, it is equivalent to 7i, where "i" represents the imaginary unit defined as the square root of -1. Thus, the answer is 7i.
What is the procedure of - 56÷-7I need the procedure of this question?
-56/-71 or 56/71
How do you do the math problem (4-3i)(5 2i)?
To multiply complex numbers you can use the same FOIL rule that you use for multiplying binomials (First, Inside, Outside, Last).(4 - 3i)(5 + 2i) = (4)(5) +(4)(2i) - (3i)(5) - (3i)(2i) = 20 + 8i-15i - 6(i)^2= 20 -7i - 6(-1) = 20 + 6 -7i = 26 -7i.
