1. ## Simplyfing dificulties

hi there

ive got a really important maths exam on friday morning and ive just started going through some old maths papers again, and its been such a long time since i done some of it and im slightly stuck on simplifying this;

a^2 - 3ab * 2a + 6b ab

any help would be much apreciated

mike

2. Is this really the question: $\displaystyle a^2 - (3ab)(2a) + 6bab$?

If so, then the first rule I would apply is that $\displaystyle x\times x = x^2$

$\displaystyle = a^2 - 6a^2b+6b^2a$

Then, you can remove a common factor of a:

$\displaystyle =a(a - 6ab + 6b^2)$

3. sorry i really must apologise i forgot the + sign

a^2 - 3ab * 2a + 6b + ab

is it

sorry i really must apologise i forgot the + sign

a^2 - 3ab * 2a + 6b + ab

is it

$\displaystyle a^2 - (3ab)(2a) + 6b + ab$

Start in the same way as before. I don't think there's really a lot you can do with this in its present state though.

5. this is the trouble i was having, the answer that my lecturer has given me is a^2 - 3ab * 2a + 6b + ab simplyfied is = to (ab) which puzzled me even more

6. ok i got

a^2 - (3ab)(2a) + 6b +ab

a^2 - 6 a^2 b + 6b + ab

a^2 - b(6 a^2 + 6 + a)

can anyone simplify that anymore???
have i gone wrong?

cheers mike