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Maths
GCSE

Find the stationary points of y = x^3 -3x^2 - 9x +5

A stationary point is a point where dy/dx = 0.First we need to find dy/dx. This is done by differentiating y term by term to get dy/dx = 3x^2 - 6x - 9.Setting this equal to zero, we need to solve 3x^2 - 6...

AS
Answered by Adam S. Maths tutor
5748 Views

Make x the subject 2x+3=3x-1

rearrange by taking away 2 and adding 1

KA
Answered by Katherine A. Maths tutor
2719 Views

Find the values of x: x^2 + 14x + 22 = 4x -2

x2 + 14x + 22 = 4x -2
1) First you should arrange the equation into the format ax2 + bc + c = 0. This gives x2 + 10x + 24 =02) Factorise into (x+n)(x+m) = 0. To work...

GM
Answered by Gemma M. Maths tutor
2874 Views

How do function transformations work?

Typically consists of a rundown of all 6 function transformations in a way which is interactive with the student.

JP
Answered by Jay P. Maths tutor
2741 Views

Solve algebraically the simultaneous equations x^2 + y^2 = 25 and y - 3x = 13

Start to solve by substitution: eqn 1 x^2 + y^2 = 25eqn 2 y - 3x = 13 => y = 3x + 13Substitute eqn 2 into 1: x^2 + (3x +13)^2 = 25expand and simplify the equation ...5x^2 + 39x + 72 = 0

RR
Answered by Rosita R. Maths tutor
2716 Views

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