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Express 1/(x(1-3x)) in partial fractions.

1/(x(1-3x))= A/x+ B/(1-3x) 1= A(1-3x) + B(1-3x) when x=0 1=A when x= 1/3 1=B/3 so B=3 1/(x(1-3x))= 1/x + 3/(1-3x)
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Answered by Laura B. • Maths tutor
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Expand and simplify (m + 3)(m + 10)

(m+3)(m+10) m 2 + 3m+ 10m + 30 m 2 +13m+ 30
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Answered by Laura B. • Maths tutor
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Translate the following text into Spanish.

Text to be translated: Of all the problems that worry teenagers nowadays, it could be said that unemployment is the worst since it often leads to poverty and anti-social behaviour. However, a friend of mine,...
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Answered by Laura B. • Spanish tutor
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How do you know when to use the subjunctive in the present tense?

I find that the acronym WEIRDO is always the perfect starting block for deciding when the use of the subjunctive is appropriate. W - wish - when a desire is expressd in the sentence from one person onto anot...
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Answered by Alex R. • Spanish tutor
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Express 9^(3x+1) in the form 3^y, giving "y" in the form "ax+b" where "a" and "b" are constants.

9= 3 2 so 9 3x+1 = 3 2(3x+1) = 3 6x+2 y= 6x+2 where a=6 and b=2
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Answered by Laura B. • Maths tutor
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