Question

Identify which technique would be best applied to factor the polynomial below. x^2-25 A. difference of two squares B. grouping C. greatest common factor D. perfect square trinomial

Answer 1

Since x² and 25 are the squares of x and 5 respectively, the best technique is A. difference of two squares.


`x^2-25=x^2-5^2=(x-5)(x+5)`