Respuesta :
The greatest common factor of all the given algebra terms is; 3x²
How to find the greatest common factor?
To get the greatest common factor, we have to first find the factors of each term;
Factors of 3x⁴ are; 3x² and x²
Factors of 15x³ are 5, 3x² and x
Factors of 21x² are 7 and 3x²
Thus, the greatest common factor of all terms is 3x²
Read more about Greatest Common Factor at; https://brainly.com/question/219464
#SPJ2
