Solve the Equation x⁶-4x⁴=0: Sixth-Degree Polynomial Problem

Question

x64x4=0 x^6-4x^4=0

Video Solution

Solution Steps

00:00 Find X
00:03 Factor with X to the fourth power
00:12 Take out the common factor from parentheses
00:23 This is one solution that zeros the equation
00:28 Now let's check which solutions zero the second factor
00:31 Isolate X
00:36 Extract root, remember when extracting root there are always 2 solutions
00:39 Positive and negative solution
00:42 And this is the solution to the question

Step-by-Step Solution

To solve this problem, we start by factoring the given equation:

The equation is x64x4=0 x^6 - 4x^4 = 0 . Notice that both terms contain a power of x x . We can factor out the greatest common factor, which is x4 x^4 .

This yields x4(x24)=0 x^4(x^2 - 4) = 0 .

Next, we apply the zero-product property, which states that if a product of factors equals zero, at least one of the factors must be zero:

  • First factor: x4=0 x^4 = 0 . This implies that x=0 x = 0 .
  • Second factor: x24=0 x^2 - 4 = 0 . We solve this quadratic equation by factoring further:

The quadratic equation x24=0 x^2 - 4 = 0 can be factored using the difference of squares:

(x2)(x+2)=0 (x - 2)(x + 2) = 0 .

Again applying the zero-product property, we set each factor equal to zero:

  • For x2=0 x - 2 = 0 , x=2 x = 2 .
  • For x+2=0 x + 2 = 0 , x=2 x = -2 .

Thus, the complete set of solutions to the equation is x=0,x=2,x=2 x = 0, x = 2, x = -2 .

Therefore, the solution to the problem is x=0,x=±2 x = 0, x = \pm 2 .

Answer

x=0,x=±2 x=0,x=\pm2