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Expand and simplify the expression (x+5)(x+8).

This question is about multiplying two brackets together. There are two parts to each bracket: x , +3 and x , +5 . The parts in the first bracket must each be multiplied by both parts in the second bracket. ...
JC
Answered by Jamie C. • Maths tutor
19048 Views

What does it mean to "complete the square"?

Completing the square is a useful method of rearranging a quadratic equation so the unknown ("x") only appears in it once. The theory of completing the square tells us that we can take a quadratic ...
CG
Answered by Caitlin G. • Maths tutor
4701 Views

What are the major components required for a oil accumulation to form.

For a hydrocarbon (oil or gas) accumulation to form a source rock, reservoir rock and cap/seal rock are required. A trapping mechanism is also essential and this can be structural or stratigraphic. A source ...
ZC
Answered by Zoe C. • Geology tutor
2696 Views

What are the differences between the preterite and the imperfect tenses?

Both tenses refer to actions in the past. The preterite is used to describe actions in the past that have been completed. Exampe: Fuí al baile anoche- I went to the dance last night. The verb ir is in the pr...
RK
Answered by Rositza K. • Spanish tutor
2066 Views

How to write a letter to friend in spanish?Tu amigo español acaba de celebrar su cumpleaños te escribe para preguntarte sobre tu colegio y tus planes para el futuro. Escríbele una carta.

As with writing a letter in English, it is important to adopt the correct register and tone for the person you are writing to. To open your letter, use one of the following options picking the best one that ...
RK
Answered by Rositza K. • Spanish tutor
6999 Views