HSC Arts 11thMaharashtra State Board
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# Complex Numbers

#### description

• Defination of Complex Number - Real part and imaginary part
• Need for Complex Numbers

#### notes

Complex Number is a combination of a real and an imaginary number in the form a + bi. a and b are real numbers, and. i is the "unit imaginary number" sqrt(−1).
For the complex number z = a + ib, a is called the real part, denoted by Re z and b is called the imaginary part denoted by Im z of the complex number z. For example, if z = 2 + i5, then Re z = 2 and Im z = 5.
Two complex numbers z1 = a + ib and z2 = c + id are equal if  a = c and b = d.

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Complex numbers [00:18:28]
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