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Factorise x^2 - 7x + 12 = 0

Method 1) Find two numbers which multiply to 12, and who’s sum is -7. ( This could be done by writing out the factors of 12, and seeing which add to -7.) From doing this we get -3 and -4, therefore our answe...
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Answered by Rachel S. • Maths tutor
24354 Views

How do you differentiate?

Say you have the term y=3X 2 . You start by bringing the power down and placing it in front of the 3 so they multiply like so y=2x3X 2 then next you take one away from the power like so y=2x3X 1 . This can t...
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Answered by Alex Y. • Maths tutor
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What steps do I need to complete in order to apply for Medical School?

Applying to medical school can be a confusing and challenging process but having a clear timeline in your head and remaining organising puts you in the best position to have a successful application. The dea...
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Solve 4(x-5)=3x-6

First, expand brackets to make your life easy. So you would do 4 times x and 4 times -5 to give u 4x-20. Then gather all the x's on one side of the equation and numbers on the other side. 4x-20=3x-6. Remembe...
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Answered by Aymen S. • Maths tutor
5429 Views

Calculate the concentration, in mol dm-3, of a solution of chloric (I) acid, HOCl , which has a pH of 4.23. Chloric acid is a weak acid, with Ka = 3.72 x 10^-8

[H+] = 10^-4.232) [H+]^2 = Ka x [HA]3) [HA] x Ka = (3.467368505 x 10^-9)4) [HA] = 0.0932
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Answered by Afshaun A. • Chemistry tutor
6807 Views