In Exercises 95–99, perform the indicated operations and write the result in standard form. (i85 - i83)/i45
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1. Equations & Inequalities
The Imaginary Unit
Problem 7
Textbook Question
In Exercises 1–8, add or subtract as indicated and write the result in standard form. 8i - (14 - 9i)
Verified step by step guidance1
Identify the expression to simplify: \$8i - (14 - 9i)$.
Distribute the negative sign across the terms inside the parentheses: \$8i - 14 + 9i$.
Group the real parts and the imaginary parts separately: \((-14) + (8i + 9i)\).
Combine like terms: the real part remains \(-14\), and the imaginary parts add up to \$17i$.
Write the final expression in standard form \(a + bi\): \(-14 + 17i\).
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Complex Numbers and Standard Form
Complex numbers are expressed in the form a + bi, where a is the real part and b is the imaginary part. Writing the result in standard form means combining like terms so the expression is clearly separated into real and imaginary components.
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Distributive Property
The distributive property allows you to remove parentheses by multiplying a term outside the parentheses by each term inside. For example, subtracting (14 - 9i) means distributing the negative sign to both 14 and -9i.
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Multiply Polynomials Using the Distributive Property
Combining Like Terms
After distributing, combine the real parts together and the imaginary parts together. This simplifies the expression into a single complex number in standard form, making it easier to interpret and use.
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Combinations
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