Algebra-1

To find the x-intercepts of the quadratic equation x² + 10x + 21 = 0, we set the equation equal to zero.

x² + 10x + 21 = 0

To solve this quadratic equation, we can use factoring, completing the square, or the quadratic formula. In this case, factoring is the most convenient method.

The factors of the quadratic equation are:

(x +...