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What are the possible ways to find the roots from a quadratic equation?

quadratic equation where the coefficients of the quadratic equation: ax^2 + bx + c are substituted into the formula: [-b +- (b^2 - 4ac)^0.5] / 2a. The roots are what x equalscompleting the square where the c...
SB
Answered by Sophie B. • Maths tutor
3825 Views

Factorise and Solve x^2 + 10x + 15 = -6

To factorise an equation like this we must first make the equation equal to 0 therefore it becomes: x^2+10x+21.Now we have the equation in a way that we can work with it we can factorise.To do this we need t...
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Answered by Joseph V. • Maths tutor
3741 Views

Yesterday it took 5 cleaners 4 and ½ hours to clean all the rooms in a hotel. There are only 3 cleaners to clean all the rooms in the hotel today. How much time will it take them?

Firstly we need to identify what is the underlying principle of this question and what are the assumptions we have to make. We are given some information about the cleaning process in a hotel. The variables ...
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Answered by Viola V. • Maths tutor
13421 Views

Décris une journée typique.

Ma journée commence quand je me réveille à 7 heures du matin. Je me lève, je m'habille, je mange mon petit déjeuner et je me brosse les dents. Ensuite, ma maman m'accompagne à l'école. A l'école j'apprends b...
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Answered by Sophie B. • French tutor
11183 Views

How do you form the imperfect tense?

Firstly, take a verb that you want to conjugate e.g. Comer (to eat). Take off the ending -er- leaving it as 'com' (do the same for -ar- and -ir- verbs) then add an ending using the imperfect tense verb endin...
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Answered by Lucy W. • Spanish tutor
2385 Views