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Solve x^2 + x/2 =5

Although this may look more complicated than normal, this is just a normal qudratic equation. First by rearranging the equation we can get it into a simpler form, and then we can go about solving it. The fir...
HJ
Answered by Hannah J. • Maths tutor
6546 Views

Below is a question from the Edexcel Maths Core 1 textbook, Solve the equation x^2 + 8x + 10 = 0 using completing the square.

Before we get to solving the equation, let’s first review the method completing the square. Completing the square is simply to convert an equation into the form of (x±a )^2, so it is possible to solve for x....
LZ
Answered by Lily Z. • Maths tutor
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How many lines of method should I write in order to get all of the marks?

The examiner is not an alien from space! It is important that you are clear how you got from one line of working to the next however you do not need to do every little part as a separate line of working. If ...
TD
Answered by Tutor35551 D. • Maths tutor
4367 Views

At x=3, is the polynomial y= (4/3)x^3 -6x^2 + 11 at a maxima or minima?

First, take the first differential: y' = 4x^2 -12x. At x=3 y'= 0 so therefore the function is at a point of inflection. Taking the second derivative: y'' = 8x -12. At x=3 y''= 12. As 12 is greater than 0, th...
JT
Answered by James T. • Maths tutor
4185 Views

Differentiate ((x^2)+1)^2

To differentiate this, we use the power rule and the chain rule. First we differentiate the outside part, which equals 2((x^2)+1). However, because the inside of the square is a function, we have to differen...
AC
Answered by Adrian C. • Maths tutor
8486 Views