Solve (x+5)² - 49: Finding X-Axis Intersections

Question

Find the intersection of the function

y=(x+5)249 y=(x+5)^2-49

With the X

Video Solution

Step-by-Step Solution

To find the intersection of the function y=(x+5)249 y = (x+5)^2 - 49 with the x-axis, we need to solve the equation for y=0 y = 0 .

Set the equation equal to zero:

(x+5)249=0(x+5)^2 - 49 = 0

Add 49 to both sides:

(x+5)2=49(x+5)^2 = 49

Take the square root of both sides, remembering to consider both the positive and negative roots:

x+5=7x + 5 = 7 or x+5=7x + 5 = -7

Solve for xx in both cases:

  • For x+5=7x + 5 = 7:
    x=75x = 7 - 5
    x=2x = 2
  • For x+5=7x + 5 = -7:
    x=75x = -7 - 5
    x=12x = -12

Therefore, the x-intercepts of the function are (12,0)(-12, 0) and (2,0)(2, 0).

Thus, the function intersects the x-axis at these points.

(12,0),(2,0)(-12, 0), (2, 0)

Answer

(12,0),(2,0) (-12,0),(2,0)