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A graph is sketched with the equation x^2+4x-5. Find the minimum point of this graph.

Okay so the first thing we can identify is that it is a quadratic, hence the x 2 at the beginning. From this we can now start to answer the question. To calculate the minimum point we must " complete th...
HS
Answered by Harry S. • Maths tutor
5123 Views

For the curve C with equation y = x4 – 8x2 + 3. Find dy/dx

dy/dx= 4x 3 _ 16x
EP
Answered by Edward P. • Maths tutor
4066 Views

Richard wants to find out how often people buy crisps, a) name two things that are wrong with his survey question and b) create a better one

This is Richard's question on a survey: How often do you buy crisps? Often [ ] Sometimes [ ] Never [_] (a) Write down two things that are wrong with this survey question If you are writing a survey you shoul...
GW
Answered by Gemma W. • Maths tutor
9391 Views

If a rectangle has area 48cm2 and sides length 6cm and (3x+2)cm, what is the value of x?

First we need to look at the important information and draw a diagram (on whiteboard). Now, we know that the area of the rectangle is 48cm2 and that the area of any rectangle is: length side a x length side ...
RH
Answered by Rebecca H. • Maths tutor
10427 Views

Factorise the expression: 2x^2 + 17x + 21

There are several ways to factorise this quadratic expression, but the best way in my opinon is: Take the constant in front of the x^2 and multiply it by the standalone constant (i.e. multiply 2 by 21, which...
TM
Answered by Tushar M. • Maths tutor
9691 Views