Question

Calculus, factor the given polynomial.

Answer 1

Answer:

x² + 10x + 21 = (x + 3)(x + 7)

Step-by-step explanation:

x² + 10x + 21 = x² + (3x + 7x) + 21

                    = (x² + 3x) + (7x + 21)

                    = x(x + 3) + 7(x + 3)

                    = (x + 3)(x + 7)