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factorise x^2 - x - 6

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KC
Answered by Kushal C. • Maths tutor
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The length of a plank of wood is 80cm to the nearest 1cm. What is the largest and smallest possible value for the actual length of the plank?

Bounds can be used when a value has been approximated. e.g. The length of a plank of wood is 80cm to the nearest 1cmThe lower bound is the smallest value that would round up to the estimated value. In this e...
LT
Answered by Lydia T. • Maths tutor
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What is the density of a material if 4 cubic metres (m3 ) of it has a mass of 2,200 kg?

Density can be described as the amount of mass per unit volume. It describes how closely together different particles are spaced. It varies significantly from solids to liquids to gases.In terms of calculati...
JM
Answered by Jamie M. • Physics tutor
6335 Views

f(x)=2x^2 -8 What is the value of x if f(x)=0, x>0

This would be a typical B grade GCSE question. Firstly, let's set f(x) to 0 , where now we have 0=2x 2 -8 . We now need to rearrange to find x. First, move the -8 to the other side of the "=" sign,...
TD
Answered by Tutor122314 D. • Maths tutor
5848 Views

How do I know when to use which past tense in French when I'm translating/writing?

The easiest way to correctly use different tenses, and particularly past tenses, when writing in French, or translating into French, is to remember the different values linked to each tense, in the context o...
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Answered by Florence D. • French tutor
2821 Views