Finding Intersection Points: Solve for x in y = (x-1)(x+10)

Question

Determine the points of intersection of the function

y=(x1)(x+10) y=(x-1)(x+10)

With the X

Video Solution

Solution Steps

00:00 Find the intersection point with the X-axis
00:03 At the intersection point with X-axis, Y value must = 0
00:07 Substitute Y = 0 and solve to find X values
00:13 Find what makes each factor zero in the multiplication
00:20 This is one solution
00:28 This is second solution
00:33 And this is the solution to the question

Step-by-Step Solution

To find where the function intersects the x-axis, we set y=(x1)(x+10)=0 y = (x - 1)(x + 10) = 0 .

Using the Zero Product Property, if the product equals zero, at least one of the factors must be zero:

  • If (x1)=0 (x - 1) = 0 , then x=1 x = 1 .
  • If (x+10)=0 (x + 10) = 0 , then x=10 x = -10 .

Thus, the function intersects the x-axis at the points where x=1 x = 1 and x=10 x = -10 . These give us the points (1,0)(1, 0) and (10,0)(-10, 0) respectively, as the y-coordinate is zero for all x-intercepts.

Therefore, the points of intersection are (1,0) (1, 0) and 10,0)-10, 0) .

Answer

(1,0),(10,0) (1,0),(-10,0)