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Maths
GCSE

Expand and simplify (x+6)(x+4)

Answer: x2+10x+24

Method: A handy way of knowing how to expand brackets involves the pneumonic FOIL: 

- F stands for First, so we multiply the first term in the first bracket by t...

EM
Answered by Emma M. Maths tutor
23431 Views

How do I multiply or divide fractions without a calculator?

For multiplication: Firstly, write out the sum you are trying to do, for example 3/4 X 1/8 Then, times the top numbers by each other and the bottom numbers by each...

WM
Answered by William M. Maths tutor
17313 Views

Work out the value of x and y in the parallelogram ABCD.

5x - 20 = 2x +43 -> 5x-2x= 43+20 -> 3x=63 -> x=21 therefore x=21 

(2x+43) + (4y-5x)=180  -> 2x+43+4y-5x=180 (because adjacent angles in a parallelogram equals 180) 

4y-3x=180-43 ...

KS
Answered by Kwarteng S. Maths tutor
21635 Views

n sweets, 6 are orange, the rest are yellow. Sophie takes at random a sweet. She eats the sweet. Sophie then takes at random another sweet. She eats the sweet. The probability that Sophie eats two orange sweets is 1/3. Show that n² – n – 90 = 0

If Sophie takes a sweet from the bag on her first selection, there is a 6/n chance it will be orange. That’s because there are 6 oranges and n sweets. If Sophie takes a sweet from the bag on her second se...

OL
Answered by Oliver L. Maths tutor
2813 Views

Differentiate the following: 5x^3 + 4x^2 + 3x + 2

dy/dx = 15x^2 + 8x + 3

Differentiation was often a question my peers struggled with at gcse and although not necessairly a dominating topic of the syllabus, I found it is an easy way to pick up mar...

CG
Answered by Callum G. Maths tutor
3026 Views

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