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How do you complete the square?

You start off with a formula in the form y = x² + bx. The first step is to add the square of half of the coefficient of x: (b/2)². This allows us to rearrange the formula into (x+ b/...

Answered by Jamie M. • Maths tutor

2545 Views

a) Give a balanced equation for the complete combustion of butane, b) Explain how this would change if there was insufficient oxygen present, and explain the problems this causes

C₄H₁₀ + 6.5O₂ -> 4CO₂ + 5H₂O
If there is not enough oxygen, incomplete combustion will occur, so CO (carbon monoxide) will be formed, carbon ...

Answered by Abigail P. • Chemistry tutor

7277 Views

To what extent was Neville Chamberlain's policy of appeasement responsible for the rise of Hitler and the eventual start of the Second World War?

Although Neville Chamberlain is often blamed for being solely responsible for allowing Hitler to mobilise a Germany that was spoiling for war, the extent to which this is the main reason is limited. A Eur...

Answered by Harry F. • History tutor

2425 Views

How do I use verbal aspect in the past tense?

In Russian, verbal aspects are used to indicate the state of the action that you are talking about. In English we can distinguish between ongoing actions (e.g. “I have been reading a book”) and completed ...

Answered by Emma B. • Russian tutor

1176 Views

How do I choose which term do I differentiate/integrate when I am integrating by parts

What you would do in this scenario is consider all the terms in the expression you are integrating. You then want to go through the acronym LATE to choose which term you should differentiate.L stands for ...

Answered by Federico P. • Maths tutor

2999 Views