Question

Simplify Completely:
Radical Expressions Help

Answer 1

\[5x^2-21x-20 \div 5x^2-16x-16\]

Answer 2

Its rational expressions

Answer 3

First, factor the numerator and factor the denominator.
Let's start with the numerator
5x^2 - 21x - 20 = ( ) ( )

Answer 4

Can you figure out what goes in the ( )'s ?

Answer 5

(5x+1)(x-20)?...

Answer 6

is it 5x2−21x−20÷5x2−16x−16

or (5x2−21x−20)÷(5x2−16x−16) ?

Answer 7

(5x + 4) (x -5) will be your numerator

Answer 8

ok

Answer 9

For your denominator, 5x^2 - 16x - 16 factors into (x-4)(5x+4)
Now it should be obvious what you can cancel (5x-4)
What's left is the answer.

Answer 10

thanks

Answer 11

if you write the problem in one line use parentheses to avoid ambiguity