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The quadratic equation 2x^2 + 8x + 1 = 0 has roots a and b. Write down the value of a + b, a*b and a^2 + b^2.

Using Vieta's formulas, which make the correspondence between the sums and products of the roots of a polynomial and its coefficients, we can deduce that a + b = (-8)/2 = -4, ab = 1/2 =0.5 and a^2 ...

AI
Answered by Andreea I. Maths tutor
6322 Views

What is a geometric series?

geometric series is a series with a constant ratio between successive terms.

MF
Answered by Ming Fung Y. Maths tutor
4713 Views

What is an Inverse function?

An inverse function is a function that "reverses" another function. That is, if f is a function mapping x to y, then the inverse function of...

MF
Answered by Ming Fung Y. Maths tutor
5240 Views

How does filtration through the kidney work?

There are 3 key stages in filtration through the Kidney:

  1. Firstly, blood is pushed through a tubular structure called the glomerulus - imagine a bowl of noodle...
AP
Answered by Alastair P. Biology tutor
3892 Views

Why did Kennedy and Johnson escalate the conflict in Vietnam?

There are 4 really good factors to talk about when thinking about why Johnson chose to escalate the conflict in Vietnam. 

1. The most important factor is containing <...

AC
Answered by Alexander C. History tutor
7083 Views

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