Simplifying Complex Numbers: (-4 - 7i) - (4 + 5i) - (2 - i)
This article will guide you through the steps to simplify the expression: (-4 - 7i) - (4 + 5i) - (2 - i)
Understanding Complex Numbers
Complex numbers are numbers that can be expressed in the form a + bi, where a and b are real numbers, and i is the imaginary unit, defined as the square root of -1.
Simplifying the Expression
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Distribute the negative signs:
- (-4 - 7i) - (4 + 5i) - (2 - i) = -4 - 7i - 4 - 5i - 2 + i
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Combine real and imaginary terms:
- (-4 - 4 - 2) + (-7 - 5 + 1)i
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Simplify:
- -10 - 11i
Conclusion
Therefore, the simplified form of (-4 - 7i) - (4 + 5i) - (2 - i) is -10 - 11i.
This process demonstrates how to manipulate complex numbers using basic arithmetic operations. Remember to treat the imaginary unit "i" as a variable, and always combine real and imaginary terms separately.