Simplifying Complex Numbers: (2-i)-(4i)+(4+5i)
This article will guide you through simplifying the complex number expression: (2-i)-(4i)+(4+5i).
Understanding Complex Numbers
Complex numbers are numbers that can be expressed in the form a + bi, where:
- a and b are real numbers.
- i is the imaginary unit, defined as the square root of -1 (i² = -1).
Simplifying the Expression
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Distribute the negative sign: (2 - i) - (4i) + (4 + 5i) becomes 2 - i - 4i + 4 + 5i
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Combine like terms: (2 + 4) + (-1 - 4 + 5)i
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Simplify: 6 + 0i
Final Result
The simplified form of the expression (2-i)-(4i)+(4+5i) is 6.
Note: Since the imaginary component is zero, the simplified result is a real number.