How do I solve 5x^2-5x-30=0 ?

You can factor out a 5 from the equation since all of the numbers are divisible by 5
5(x^2-x-6=0)
Factor into two binomials
5(x-3)(x+2)=0
Because of the zero product property, we know that one of the two binomials (in parenthesis) must equal 0.
x-3=0 and x+2=0
Solve each INDIVIDUALLY to find the values of x
x= 3 AND x= -2

The year before the 10s so it was like when caveman were alive

221,500 is the answer