Question

Which factor do you cancel from the numerator and denominator to simplify x squared minus 4 times x minus 5 all over x squared minus 25.?

a. x + 4
b. x − 4
c. x − 5
d. x + 5

Answer 1

Start by factoring the denominator

Answer 2

what?

Answer 3

\[\huge \frac{(x-4)(x-5)}{x^2-25}\]
you can't cross anything out as of now so factor all the terms you can

Answer 4

so the answer is b?

Answer 5

Nope. You can keep guessing until you get a yeah or you can try and follow my instructions.

Answer 6

ok

Answer 7

a

Answer 8

that isn't even a thing in the expression

Answer 9

so, nah

Answer 10

does this help? \[\huge \frac{(x-4)(x-5)}{x^2-25} = \huge \frac{(x-4)(x-5)}{x+5)(x-5)}\]

Answer 11

yes its d!!!

Answer 12

You can only cross out equivalent expressions. like so: