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Factorise fully 20x^2 - 5

When factorising an expression, you first want to find the highest common factor in each term of the expression. Here, our terms are 20 and 5. The highest common factor here is 5, so we want to take 5 out of...
Answered by • Maths tutor
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Factorise x^2+5x+6

When factorizing a quadratic equation you need to try and find 2 numbers that add up to give the 2nd term and times together to give the 3rd term. We can find these 2 numbers by looking at the factors of the...
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Answered by Oscar G. • Maths tutor
4139 Views

Solve x^2+2x-8=0

x=-4, x=2When you see a quadratic equation like this, the first thing you should try and do is factorise it. You need to find two numbers that add together to make the second term of the equation - in this c...
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Answered by Kate B. • Maths tutor
12747 Views

Solve x^2+3x-18=0 for x

X=6 X=-3This simple question is the fundamental step of a vest argebra topics. Having a good understanding of this topic is crucial to studens who want to do well. Alternative method is to use quadratic form...
RL
Answered by RongFang L. • Maths tutor
3420 Views

Show that sqrt(27) + sqrt(192) = a*sqrt(b), where a and b are prime numbers to be determined

We want to get the the sqrt(27) and sqrt(192) so that they have the same number in the square so they can then be added together. We will look at the factorisation of 27, 192. We can see 27 is divisible by 3...
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Answered by Luke H. • Maths tutor
3746 Views