find the difference
(-a^2+9ab-b2)-(ab-3b^2)

Question

find the difference
(-a^2+9ab-b2)-(ab-3b^2)

anonymous · Answer

$$-a ^{2} + 9ab -b ^{2} + -ab+3b$$
do you think you can solve it from there or do you want me to show you how to get the answer step by step afterwards?

anonymous · Answer

show me step by step please because im still confused

anonymous · Answer

ok simple so how i got that was that since the equation was originally: (-a^2+9ab-b^2)-(ab-3b^2) Since there is a minus sign everything in (ab-3b^2) would turn negative making the equation $$-a ^{2} + 9ab -b ^{2} + -ab+3b ^{2}$$
afterwards you just add them together which are the common variables. so the answer should be
$$-a+8ab+2b ^{2}$$ 
(sorry i just noticed that typo i had up there it probably threw you off track)

anonymous · Answer

its okay thank you!

anonymous · Answer

it was incorrect