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(b² - 4ac)^1/2 = 0 ---> 1 root

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1) Do your research and know the mark scheme; you will be marked using the AOs (Assessment Objectives). Make sure you know what these include and how you can use them in yo...

Three whole numbers are each rounded to the nearest 10. The sum of the rounded numbers is 70.  Work out the maximum possible sum for the original three numbers.Sum of rounded numbers is 70, rounded number...

Bonjour Sylvie!
Je suis à Marseille, il fait très beau aujourd'hui. Le soleil brille et il ne fait pas trop chaud. L'hôtel où je loge est très agréable: il y a un lit, une grande fenêtre et une salle...

Law of indices : Rule: a^m * a^n = a^m+nTo multiply expressions with the same base, copy the base and add the indices. Lets start with gathering the a's - a^3 and a^2 adding the indices gets a^5Now b's - ...