Determine Intersection Points for y = (x - 11)(x + 1)

Question

Determine the points of intersection of the function

y=(x11)(x+1) y=(x-11)(x+1)

With the X

Video Solution

Solution Steps

00:00 Find the intersection points with the X-axis
00:03 At the intersection with the X-axis, the Y value must = 0
00:07 Substitute Y = 0 and solve for X values
00:13 Find what makes each factor in the product zero
00:19 This is one solution
00:28 This is the second solution
00:36 And this is the solution to the question

Step-by-Step Solution

To determine the points where the function intersects the x-axis, we need to find the x-intercepts. These occur where y=0 y = 0 .

The function is given as y=(x11)(x+1) y = (x-11)(x+1) . To find the x-intercepts, we set this function equal to zero:

(x11)(x+1)=0 (x-11)(x+1) = 0 .

This equation implies that the product is zero when either x11=0 x-11 = 0 or x+1=0 x+1 = 0 .

Solving these equations, we find:

  • x11=0 x-11 = 0 leads to x=11 x = 11 .
  • x+1=0 x+1 = 0 leads to x=1 x = -1 .

Thus, the points of intersection with the x-axis are (1,0)(-1, 0) and (11,0)(11, 0).

Therefore, the solution to the problem is (1,0),(11,0)(-1, 0), (11, 0).

Answer

(1,0),(11,0) (-1,0),(11,0)