Calculate the Intersection Points of the Quadratic Curve y=(x-3)(x+3) and the X-axis

Question

Determine the points of intersection of the function

y=(x3)(x+3) y=(x-3)(x+3)

With the X

Video Solution

Solution Steps

00:00 Find the intersection point with the X-axis
00:04 At the intersection point with the X-axis, the Y value must equal 0
00:09 Substitute Y=0 and solve to find the appropriate X values
00:17 Find what makes each factor in the product zero
00:20 This is one solution
00:24 This is the second solution
00:28 And this is the solution to the question

Step-by-Step Solution

To determine the points of intersection of the function y=(x3)(x+3) y=(x-3)(x+3) with the x-axis, we need to set y y to zero and solve for x x .

Follow these steps:

  • Step 1: Set the function equal to zero: (x3)(x+3)=0 (x-3)(x+3) = 0 .
  • Step 2: Apply the zero-product property, solving each factor for zero:
    • For x3=0 x-3=0 :
    • x=3 x = 3
    • For x+3=0 x+3=0 :
    • x=3 x = -3

Thus, the points of intersection of the function with the x-axis, or the x-intercepts, are (3,0)(-3, 0) and (3,0)(3, 0).

Therefore, the solution to the problem, confirming x-intercepts, is (3,0),(3,0)(-3, 0), (3, 0).

Answer

(3,0),(3,0) (-3,0),(3,0)