Determine Intersection Points of y=(x-2)(x+3) with the X-axis

Question

Determine the points of intersection of the function

y=(x2)(x+3) y=(x-2)(x+3)

With the X

Video Solution

Solution Steps

00:00 Find the intersection point with the X-axis
00:03 At the intersection point with the X-axis, the Y value must = 0
00:07 Substitute Y = 0 and solve to find X values
00:13 Find what makes each factor in the product zero
00:16 This is one solution
00:26 This is the second solution
00:32 And this is the solution to the question

Step-by-Step Solution

To solve this problem, we'll follow these detailed steps:

  • Step 1: Recognize that to find the intersection with the x-axis, we set y=0 y = 0 for the function y=(x2)(x+3) y = (x-2)(x+3) .
  • Step 2: Solve the equation (x2)(x+3)=0(x-2)(x+3) = 0.
  • Step 3: Use the zero-product property, which states that if a product equals zero, then at least one of the factors must be zero. Thus:
    • x2=0 x-2 = 0 or x+3=0 x+3 = 0
  • Step 4: Solve each equation:
    • For x2=0 x-2 = 0 , we add 2 to both sides, yielding x=2 x = 2 .
    • For x+3=0 x+3 = 0 , we subtract 3 from both sides, yielding x=3 x = -3 .
  • Step 5: These x-values represent the points of intersection with the x-axis, or the x-intercepts.

Thus, the points of intersection of the function
y=(x2)(x+3) y = (x-2)(x+3) with the x-axis are the coordinates (3,0)(-3,0) and (2,0)(2,0).

Therefore, the solution to the problem is the points (3,0),(2,0)(-3,0),(2,0).

Answer

(3,0),(2,0) (-3,0),(2,0)