Question
Simplify the expression
2x4−4x2
Evaluate
(x2−2)(x2×2)
Remove the parentheses
(x2−2)x2×2
Use the commutative property to reorder the terms
(x2−2)×2x2
Multiply the terms
2x2(x2−2)
Apply the distributive property
2x2×x2−2x2×2
Multiply the terms
More Steps

Evaluate
x2×x2
Use the product rule an×am=an+m to simplify the expression
x2+2
Add the numbers
x4
2x4−2x2×2
Solution
2x4−4x2
Show Solution

Find the roots
x1=−2,x2=0,x3=2
Alternative Form
x1≈−1.414214,x2=0,x3≈1.414214
Evaluate
(x2−2)(x2×2)
To find the roots of the expression,set the expression equal to 0
(x2−2)(x2×2)=0
Use the commutative property to reorder the terms
(x2−2)×2x2=0
Multiply the terms
2x2(x2−2)=0
Elimination the left coefficient
x2(x2−2)=0
Separate the equation into 2 possible cases
x2=0x2−2=0
The only way a power can be 0 is when the base equals 0
x=0x2−2=0
Solve the equation
More Steps

Evaluate
x2−2=0
Move the constant to the right-hand side and change its sign
x2=0+2
Removing 0 doesn't change the value,so remove it from the expression
x2=2
Take the root of both sides of the equation and remember to use both positive and negative roots
x=±2
Separate the equation into 2 possible cases
x=2x=−2
x=0x=2x=−2
Solution
x1=−2,x2=0,x3=2
Alternative Form
x1≈−1.414214,x2=0,x3≈1.414214
Show Solution
