Question 417535
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Hi
Finding the x-intercepts of  
 y= 225-x^2    |when y = 0
 0 = 225 -x^2
 x^2 = 225
  x = ±  15
 x-intercepts are (15,0) and (-15,0)
{{{drawing(300,300,  -220,220,-220,220,  grid(1),
circle(-15, 0,0.6),
circle(15, 0,0.6),
graph( 300, 300, -220,220,-220,220,-x^2 + 225))}}}