Top answers

What is 'grouping' and how does it work?

Grouping is essentially factorisation, it's just the idea that ax + bx = (a+b)x, which we already know. But the difficulty is in recognising this relationship when x is more complicated, for example when x= ...
FH
Answered by Farah H. • Maths tutor
4009 Views

Factorise 6x^2 - 13x + 6

(3x-6)(2x-1)
SG
Answered by Sophie G. • Maths tutor
4454 Views

Make a the subject of 3(a+4) = ac+5f

Multiply out the brackets: 3a+12=ac+5f 3a-ac=5f-12 a(3-c)=5f-12 a=5f-12/3-c
AP
Answered by Abhiraj P. • Maths tutor
4293 Views

A rectangle has an area of 20 cm2. Its length and width are enlarged by scale factor 3. Find the area of the enlarged rectangle.

Firstly, look at the given area of the rectangle. As this is 20cm 2 , the length and width of the rectangle could be a combination of 20 and 1; 10 and 2 or 5 and 4. Any of thse options could be used to solve...
AP
Answered by Abhiraj P. • Maths tutor
14166 Views

The area of the cross section of a prism is 30 cm2 . The length of the prism is 25 cm. Work out the volume of the prism.

If the cross section is 30cm 2 , then we need to multiply the cross section by the length of the prism therefore, it should be 30x25, which is 750cm 2
KZ
Answered by Kevin Z. • Maths tutor
14636 Views