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factorise 2x^2 - x - 6

2x2 - x - 6 = (2x+3)(x-2)

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Answered by Hazel T. Maths tutor
2877 Views

write 560000 in standard form

5.6 x10^5

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Answered by Hazel T. Maths tutor
4885 Views

Simplify sqrt(12)

12 = 43Therefore sqrt(12) = sqrt(43) The square root of the product of two numbers can the written as the product of the square roots of the numbersHence sqrt(4*3) = sqrt(4) * sqrt(3) sqrt(4) = 2...

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Answered by Hazel T. Maths tutor
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If we have 10 grams of Helium at a concentration of 10 mol dm-3, what volume of helium do we get.

First we need to identify that 2 equations will be in use here. 1st - moles = mass/Mr and 2nd - volume = moles/concentration This is because we need to find the volume and the only other information we ha...

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Answered by Hamaad H. Chemistry tutor
1659 Views

How would you draw a Dot & Cross diagram for the ionic bonding of Potassium and Chlorine

The potassium has 1 electron on its outer shell.A chlorine atom has 7 electrons on its outer shell Potassium and Chlorine react to form Potassium Chloride The potassium and chloride ions will then have fu...

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Answered by Manas S. Chemistry tutor
7806 Views

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