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How do I factorise and solve 2x^2+4x-6=0?

The 2 in front of the x^2 can cause confusion. In this case, the equation can be divided through by 2, to produce x^2+2x-3=0. From here it can be factorised by working out what adds to make '2' and times to ...
MR
Answered by Madeleine R. • Maths tutor
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Define Simple Harmonic Motion

The acceleration or unbalanced force is proportional to the displacement of the object from its equilibrium position and acts in the opposite direction Mathematically, this may be expressed as a=-w^2y where ...
LM
Answered by Liam M. • Physics tutor
5288 Views

Define electric current

Electric current is a measure of the rate of flow of charges. What this means is how many charges are flowing in a circuit in a certain time period. Mathematically this is expressed as I=Q/t where I is for c...
LM
Answered by Liam M. • Physics tutor
5844 Views

A curve is defined by the parametric equations x=t^2/2 +1, y=4/t -1. Find the gradient of the curve when t =2.

Firstly we would differentiate each equation with respect to t to find dx/dt and dy/dt- which gives us dx/dt=t and dy/dt=-4t^-2. Once you have found these you must divide dy/dt by dx/dt (or dy/dt x dt/dx) wh...
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Answered by Asha V. • Maths tutor
8289 Views

How should I go about categorising texts?

The first thing I would keep in mind when trying to categorise a text or a number of texts is that there are multiple different ways to categorise texts, but there has to be data in these texts to support th...
AR
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