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How do I solve a quadratic equation by competing the square?

How would you solve x 2 +8x+16=81 Show that this can be factorised (x+4) 2 =9 2 Which can then be easily solved by square rooting both sides What if we could now use this method to solve all quadratics?!!? C...
Answered by • Maths tutor
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how do you calculate the charge of a neuclues compared to an ion?

With an neucleus, the charge is calculated by using the formula: number of protons x the charge of a single electron with an ion, the charge is calculated using the formula:number of extra charge x charge of...
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Answered by Kulsoom Q. • Physics tutor
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Can one know whether one has hands?

Initially one might argue that one cannot know one has hands, because any past experience of hands could merely be a dream about hands. After all, and as Descartes suggested, dreams often feel real until one...
JM
Answered by Joseph M. • Philosophy tutor
3743 Views

What is the function of mitochondria?

Mitochondria is an organelle responsible for providing energy. Mitochondria releases energy through the chemical process of aerobic cellular respiration, where one molecule of glucose can be broken down (oxi...
NF
Answered by Natalia F. • Biology tutor
10723 Views

Who is a refugee?

Why is a refugees different from other migrants? The first definition of who is a refugee was provided by the the Refugee Convention, signed in Geneva in 1951. Nowadays that definition is still working; cons...
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Answered by Laura P. • Law tutor
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