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What is the standard form of this complex number? (2 + 2i)/(1-i)

a.1 + i
b.1 - i
c.0 - i
d.0 + 2i

1 Answer

6 votes

Final answer:

To find the standard form of the complex number (2 + 2i)/(1-i), we multiply the numerator and the denominator by the conjugate of the denominator, which results in the number 2i. However, this answer does not match any of the provided options, suggesting a potential error in the question. The correct answer is option d.0 + 2i

Step-by-step explanation:

The standard form of the complex number (2 + 2i)/(1-i) can be found by rationalizing the denominator. To do this, we multiply both the numerator and the denominator by the complex conjugate of the denominator, which is (1+i). The complex conjugate turns the denominator into a real number because when a complex number is multiplied by its conjugate, the imaginary parts cancel out. The multiplication gives us:

(2 + 2i) * (1 + i) / (1 - i) * (1 + i) = (2 + 2i + 2i + 2i^2) / (1 - i^2)

Since i^2 is equal to -1, we get:

(2 + 4i - 2) / (1 + 1) = (4i) / 2 = 2i

However, none of the provided options matches 2i. This suggests there might be an error in the question, or the provided options are incorrect.

answered
User Jay Fridge
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