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Show that (x + 4)(x + 5)(x + 6) can be written in the form ax3 + bx2 + cx + d where a, b, c and d are positive integers.

=(x+4)(x²+6x+5x+30)=(x+4)(x²+11x+30)=x³+11x²+30x+4x²+44x+120=x³+15x²+74x+120

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What are moles and how do you calculate them?

Well this depends whether you require the moles of gas, solid or solution as to which equation you use, moles relate the mass of the atom of interest to that of the number of atoms in 12 grams of carbon-1...

Answered by Benjamin T. • Chemistry tutor

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“I control foreign policy.” Discuss [45 marks]

The President is granted the role as commander in chief with the ability to control foreign policy in the way that he wants. Despite this power, recent and past attempts by Congress have aimed to roll bac...

Answered by Jevan L. • Government and Politics tutor

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How important is knowledge of historical context when answering exam questions?

Many exam boards, as part of their assessment objectives, require students to discuss literary texts with their historical/social context in mind - however it should not dominate an answer as relaying his...

Answered by Alice G. • English Literature tutor

3494 Views

Explain why an extensive network of capillaries and ventilation of the lungs helps to maximise the effectiveness of gas exchange.

The capillaries deliver blood that has high carbon dioxide levels and low oxygen levels and take away blood that has high oxygen levels and low carbon dioxide levels. This means there is always a concentr...

Answered by Annabel C. • Biology tutor

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