Originally Posted by **askmemath**

I must be growing senile in my old age. Else how can you explain I have simply forgotten how to do this problem

Find the illegal values of c in the multiplication statement c^2-3c-10 over c^2+5c-14 times c^2-c-2 over c^2-2c-15.

a.) c=7, c=3, c=-2, c=-5 b.) c=-7, c=-3, c=-2, and c=5 c.) c=-7, c=-3, c=2, and c=5 d.) c=-7 and c=-3

I reached as far as this ((c+2)(c+1)/(c+7)(c+3))

Now what? Something has to equal 0 except I dont know if its the numerator or the denominator.

Similarly

Find the illegal values of b in the fraction 2b^2+3b-10 over b^2-2b-8.

a.) b=-5 and 2 b.) b=-2 and -4 c.) b=-2 and 4 d.) b=-5, -2, 2 and 4

Help Please