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Evaluate the following product of two complex numbers: (3+4i)*(2-5i)

Answer : 26-7iMethod : Expanding the brackets will result in the sum, 6 -15i + 8i - 20i2by assessing this you can see that you can evaluate -15i + 8i to be equal to -7i which is the imaginary p...

CB
1644 Views

Differentate sin(x^2+1) with respect to x

y = sin(x2+1) In general, the chain rule is: dy/dx = f(g(x)) = df/dg * dg/dx Applying this to y: dy/dx = d(sin(x2+1))/d(x2+1) * d(x2+1)/dx = cos(x2+1...

Answered by Maths tutor
2963 Views

What is the difference between the IMF and World Bank?

The IMF (International Monetary Fund) and World Bank both aim to enable and encourage international trading, however their specific goals are different. The IMF aims to stabilise ...

Answered by Geography tutor
4779 Views

How do I write a good history essay?

A good history essay should show the reader three main things: a good, wide ranging knowledge of the subject, an understanding of the nature of the question and the different factors relating to it, and t...

WH
Answered by William H. History tutor
1604 Views

Solve algebraically the simultaneous equations, x^2 + y^2 = 25 and y – 3x = 13

First you need to pick a variable to solve for( irrelevant which one is picked) so I will choose to solve y first as in this question it is easier (as y has no coefficient). So make y the subject of the s...

BU
Answered by Benjamin U. Maths tutor
2592 Views

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