i've now got the question: factorise: but i don't know what to do when its only letters involved without the help of any numbers, could someone show me how to do it this way?
i've now got the question: factorise: but i don't know what to do when its only letters involved without the help of any numbers, could someone show me how to do it this way?
thanks
This is a standard factorisation known as the difference of two cubes. Normally a and b are used but I picked p and q since a is used in the question.
i tried that formula out but it didn't seem to work. say i put p = 4 and q = 2 the equation would be so then it would be which then leads to then 32 - 16 + 8 = 24 ,so obviously not 56. whats gone wrong here?
i tried that formula out but it didn't seem to work. say i put p = 4 and q = 2 the equation would be so then it would be which then leads to then 32 - 16 + 8 = 24 ,so obviously not 56. whats gone wrong here?
You treated as . The sign is already taken into account and it's treated as positive