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Maths
GCSE

Write (x-2)/3 + (x+3)/5 as a single fraction

To write this sum as a single fraction we need to put both of them over a common denominator. Our common denominator will be the simplest thing that has both 3 and 5 as a factor, which is 15 (x-2)/3 + (x+...

NC
Answered by Nisha C. Maths tutor
10954 Views

Factorise x^2+2x-8

Firstly, note the general equation for a quadratic: ax^2+bx+c. We can see that in the above equation, a=1, b=2 and c=-8. When factorising we have to consider the product ac and b. ac=1(-8)=-8 and b=2. Now...

KT
Answered by Katie T. Maths tutor
7853 Views

Solve the simultaneous equations: x2 +y2 =5 and y = 3x + 1

x=-1, y=-2 x=2/5, y=11/5 or 2 and 1/5

EH
Answered by Emily H. Maths tutor
7458 Views

How do you rationalise the denominator?

If a denominator is has just one square root (i.e 1/(3)^0.5). Then, since it is a fraction you can multiply top and bottom by the same number and maintain the value of the fraction. Hence we multiply top ...

NA
Answered by Natasha A. Maths tutor
3800 Views

Solve this question

2X2 = 4

MK
Answered by Maria K. Maths tutor
3409 Views

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