Top answers

How do you form the imperfect subjunctive in Spanish?

The imperfect subjunctive in Spanish expresses what the present subjunctive would, but is used when talking about a situation in the past. In order to form it, firstly you would need to take the third person...
IP
Answered by Irini P. • Spanish tutor
3860 Views

Is there any rational number whose square is 2?

We all know the the square root of 2 is irrational. So, the answer should be no. But how do we prove it?Let's assume for contradiction that x 2 =2 and that x is rational. Then x can be expressed as a rationa...
AS
Answered by Andrei S. • Maths tutor
13486 Views

Is a positive integer even if its square is even?

Let's take a positive integer n.We can write it as a product of prime numbers:n=p 1 p 2 ...p r , where p 1 , p 2 , ..., p r are prime factors of n.Now, assume that n 2 is even. Then one of the p i equals 2. ...
AS
Answered by Andrei S. • Maths tutor
3816 Views

How do I avoid using a robotic structure in my paragraphs, while also thoroughly analysing and embedding quotes?

Most students at GCSE are taught to use the structure of PEE (Point Evidence Explanation) in each of their paragraphs in order to construct their argument. However, A-level requirements differ, as examiners ...
JS
Answered by Jemma S. • English tutor
5956 Views

What are differential equations, and why are they important?

Let's begin by reviewing a fairly simple (linear) equation: (1) y = 2x + 3 (1) describes the relationship between two variables, x and y . Given a value for one, we can use (1) to work out the value of the u...
XD
9437 Views