Question

What is the greatest common factor of 75 and 3O?

Answer 1

`GCF(75,30)=color(blue)(15)`

Explanation:

Taking the prime factors of each:
`75 = color(white)(2xx)color(blue)(3xx5)xx5`
`30 = 2xxcolor(blue)(3xx5)`

Common factors: `color(blue)(3xx5)=color(blue)(15)`