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A curve has equation y = x^3 - 48x. The point A on the curve has x coordinate -4. Is A a stationary point?

A stationary point indicates that the gradient at that coordinate is 0. Hence we need to find the gradient of the line, set this to 0, and then substitute our value of x. Find dy/dx. Remember the equation fo...
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Answered by Oliver H. • Maths tutor
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Describe and explain the change in the shape of the graph y=x^2 and y=x^2 + 2.

The graph is translated by two in the positive y-axis direction. For example, for the equation y=x 2 , taking the x-axis values of 0,1,2 and 3, y= 0 2 ,1 2 , 2 2 and 3 2 respectively: These values being 0,1,...
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Answered by Matthew S. • Maths tutor
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Please expand (y+2)(y-3).

We will use the FOIL method. Here FOIL stands for: First, Outside, Inside, Last. This means we start by multiplying the first terms in each bracket together to get y 2 . Then we multiply the outside terms to...
MB
Answered by Mary B. • Maths tutor
8657 Views

Please solve the following simultaneous equations 4x + 7y = 336 y = 6x + 2

Step 1 - through previous experience realise this equation can be solved by the substitution methodStep 2 - rearrange for the part you want to sub in, in this case it is done for us as Y is the variable we w...
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Answered by Eleanor S. • Maths tutor
3628 Views

Work out the value of n, the value of A & the value of B (question given below in correct subscript)

(2x 3/2 y -1 ) n = Ax 6 y B First of all both sides need to be written in the same format so simplify the left hand side. 2 n (x 3/2 ) n (y -1 ) n We are given the power of x is 6 so we can write and equatio...
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Answered by Megan L. • Maths tutor
4690 Views