- Simplify (1+2i)-(-2-2i)?

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Can someone answer and explain how to do the following problem: * (-2i)²

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Solve sin x (degrees) = 29/30? How many times more massive is the Sun than the Earth? What type of evidence is the best indicator of how closely two species are related? I think I'm doing this wrong. Find all values of x for which the geometric series converges and find its sum.
Σ (n 0 to inf)(3x-11)^n.? What is the difference between the logic gate inputs and vcc input?

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