Top answers

multiply out (2x-4)(x-2) and simplify.

The method I would use here is FOIL (first outer inner last). A common mistake is not multiplying out all terms, using FOIL will ensure you do this.The working I would expect to see:2x^2-4x-4x+8 (order shows...
BW
Answered by Ben W. • Maths tutor
4508 Views

When should I use the nominative case?

The nominative case is used for the subject of the verb, i.e. the noun doing the action. Consider this example: my brother has a dog. In this simple sentence, my brother is the subject of the verb as he owns...
EH
Answered by Emily H. • German tutor
1880 Views

Why the human heart is described as a "double pump" and what is the physiological significance of this?

The human heart is described as a double pump because blood passes through it and gets pumped out of it twice in a single circuit of the circulatory system. A normal heart is separated into two halves, right...
JF
Answered by James F. • Biology tutor
17217 Views

I don't quite understand classical conditioning, can you talk me through it?

Some stimuli provoke an innate reaction—for example, a loud noise causes most people to startle. If I suddenly made a loud noise and you weren't expecting it, you'd probably jump a little. There are some sti...
AM
Answered by Abbie M. • Psychology tutor
3720 Views

How are verbs inflected for aspect in English?

There are four different types of aspect in English: simple, perfect, progressive and perfect progressive. The perfect aspect is used for actions that have been completed, while the progressive shows that an...
HM
4726 Views