Find The $x$ -Intercepts of the Graph of the Equation $y=x^{2}+4 x-21$

Multiple Choice

Find the $x$ -intercepts of the graph of the equation. (The grids are intentionally not included.)
- $y=x^{2}+4 x-21$

A) $(-7,0) ,(3,0)$
B) $(-8,0) ,(4,0)$
C) $(0,-21)$
D) $(-4,0) ,(2,0)$