Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

Solve 
(x+2)/(x-5) >= 0.

Solve x+2x50\frac{x+2}{x-5} \geq 0.

Full solution

Q. Solve x+2x50\frac{x+2}{x-5} \geq 0.
  1. Find Critical Points: Find the critical points of (x+2)/(x5)(x+2)/(x-5). The critical points are where the numerator equals zero or the denominator equals zero, since these are the points where the expression could change sign. Numerator: x+2=0x + 2 = 0 implies x=2x = -2. Denominator: x5=0x - 5 = 0 implies x=5x = 5. Critical points: 2,5-2, 5
  2. Determine Intervals: Determine the intervals using the critical points. The critical points divide the number line into three intervals. Intervals: (,2)(-\infty, -2), (2,5)(-2, 5), (5,)(5, \infty)
  3. Test Sign: Test the sign of (x+2)/(x5)(x+2)/(x-5) in each interval.\newlineChoose a test point from each interval and substitute it into the inequality to determine the sign of the expression in that interval.\newlineInterval (,2)(-\infty, -2): Choose x=3x = -3.\newlineSign of (x+2)/(x5)(x+2)/(x-5) when x=3x = -3: (3+2)/(35)=(1)/(8)=+(-3+2)/(-3-5) = (-1)/(-8) = +\newlineThe expression is positive in this interval.\newlineInterval (2,5)(-2, 5): Choose x=0x = 0.\newlineSign of (x+2)/(x5)(x+2)/(x-5) when x=0x = 0: (,2)(-\infty, -2)00\newlineThe expression is negative in this interval.\newlineInterval (,2)(-\infty, -2)11: Choose (,2)(-\infty, -2)22.\newlineSign of (x+2)/(x5)(x+2)/(x-5) when (,2)(-\infty, -2)22: (,2)(-\infty, -2)55\newlineThe expression is positive in this interval.
  4. Write Solution: Write the solution as a compound inequality.\newlineSince we are looking for where (x+2)/(x5)0(x+2)/(x-5) \geq 0, we want the intervals where the expression is positive or zero.\newlineThe expression is positive in (,2)(-\infty, -2) and (5,)(5, \infty). It is zero when x=2x = -2.\newlineTherefore, the solution is x2x \leq -2 or x5x \geq 5.

More problems from Solve quadratic inequalities