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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 - 6x -...
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Answered by Adam S. • Maths tutor
7342 Views

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

rearrange by taking away 2 and adding 1
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Answered by Katherine A. • Maths tutor
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Find the values of x: x^2 + 14x + 22 = 4x -2

x 2 + 14x + 22 = 4x -2 1) First you should arrange the equation into the format ax 2 + bc + c = 0. This gives x 2 + 10x + 24 =02) Factorise into (x+n)(x+m) = 0. To work out what n and m are, you must figure ...
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Answered by Gemma M. • Maths tutor
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How do function transformations work?

Typically consists of a rundown of all 6 function transformations in a way which is interactive with the student.
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Answered by Jay P. • Maths tutor
3560 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 + 13 Substitute eqn 2 into 1: x^2 + (3x +13)^2 = 25expand and simplify the equation ...5x^2 + 39x + 72 = 0 Factorise the equ...
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Answered by Rosita R. • Maths tutor
3262 Views