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Solve the quadratic equation x^2 + 4x +1 = 0 by completing the square.

Completing the square means to put our equation into a slightly different form which looks like this, where a and b are real numbers:

(x+a)² + b = 0

From here, we...

Answered by Andrew P. • Maths tutor

87567 Views

Essere or Avere in the simple past?

The simple past is formed with an auxiliary verb plus the past participle. The two auxiliary verbs are essere and avere.

When to use

Answered by Alex M. • Italian tutor

6487 Views

GCSE Maths - Solve the equation (2x+3)/(x-4) - (2x-8)/(2x+1) = 1 Give your answer to 2 decimal places.

This is an A* level GCSE Maths question. 'Solve' means we need to find what value x represents, but in the question this x appears on the denominator (bottom half) of the fractions which we can't use. ...

Answered by Abi R. • Maths tutor

7592 Views

How do I know whether a verb takes haben or sein in the perfect tense?

Haben and sein are used as the auxiliary verbs in the perfect tense before the past participle. Whether you need haben or sein depends on the meaning of the verb you are putting into the perfect tense. Mo...

Answered by Zoe W. • German tutor

13349 Views

What are the differences between a stack and a queue?

Both the stack and the queue are data structures, i.e. ways of storing data. It is important to know the differences between how these two data structures operate so that you know when to use one or th...

Answered by Ecaterina D. • Computing tutor

2792 Views