Math 111 - Sept 30, 2011
in vertex form
feet by 50 feet
3.4) Rational and Radical equations...
A rational equation (x's in the denominators)
We will solve this as usual.. except - we have to watch out for division by zero
There are three x's that would den.s zero: .
I'll solve this by multiplying all by com. den.
or but cross out the -2 answer.
A simpler one:
keep both answers
Second problem type: Radical equations
(x's under roots)
NOTE: you can't have negatives under even roots... AND you can't have
Solve the problem: Get the root by itself and then square both sides
wait this is impossible (NO SOLUTION)
Instead of checking all the exceptions seperately, you can just check your answers in the original.....
Odd roots can be negative...