You can put this solution on YOUR website!
1) Subtract. Simplify if possible. (17cb/(c^2-b^2)) - ((c-b)/(c+b))
2) Add. Simplify if possible. (25f/(2f-10)) + (2f/(10f-50))
3) Divide and simplify. ((z^2-81)/z) / ((z-9)/(z+1))
4) Find the LCM of z^2+12z+36 and z^2+3z-18. Use Factored Form. I think the answer is (z+3), is this correct? NO
The LCM is the least common multiple of those two expressions. In general, it must have all factors in the two expressions with the largest exponent seen in the two expressions.
The LCM must have
as factors to be a multiple of
, but we need a 2 as the exponent of
for the LCM to be a multiple of
5) Find the LCM of 21y^7 and 147y^9. I think this is 3y^7, is this right? NO
A multiple of those two expressions must have
as factors, so
6) Simplify by removing by factors of 1. 42y^5/54y^3 Is this 7y^2/9? YES