Question

What is the least common denominator of the rational expressions below? 4/x^2-7x + 1/x^2-4x-21

Answer 1

Answer:

x-7

Step-by-step explanation:

1. Find the GCF of x^2-7x (which is x) and factor x^2-4x-21

2. Multiply 1/(x-7)(x+) by x and 4/x(x-7) by (x+3) to get (x-7) as both denominators