Simplify (x+4)^(2)-(x-2)^(2)
Treat the question, (x+4)2-(x-2)2 as a2-b2 where we can simplify as (a+b)(a-b). ie. (x+4+x-2)(x+4-x+2) *be careful about change of signsWe then get (2x+2)(6) which expands to 12x+12 and we can then simplify to 12(x+1).
LT
Related Maths GCSE answers
All answers ▸How do you work out the nth term for a linear equation?
Make x the subject of the equation y=(3x+5)/(4-x)
There are 10 boys and 20 girls in a class. The class has a test. The mean mark for all the class is 60. The mean mark for the girls is 54. Work out the mean mark for the boys.
GCSE: I don't understand how to rationalise denominators