Question
Simplify the expression
x3−128x
Evaluate
x2×2x−24x×16
Multiply
More Steps

Multiply the terms
x2×2x
Multiply the terms with the same base by adding their exponents
x2+1×2
Add the numbers
x3×2
Use the commutative property to reorder the terms
2x3
2x3−24x×16
Use the commutative property to reorder the terms
2x3−2416x
Rewrite the fraction
2(x3−12)16x
Solution
x3−128x
Show Solution

Find the excluded values
x=312
Evaluate
(x2×2x−24x×16)
To find the excluded values,set the denominators equal to 0
x2×2x−24=0
Multiply
More Steps

Evaluate
x2×2x
Multiply the terms with the same base by adding their exponents
x2+1×2
Add the numbers
x3×2
Use the commutative property to reorder the terms
2x3
2x3−24=0
Move the constant to the right-hand side and change its sign
2x3=0+24
Removing 0 doesn't change the value,so remove it from the expression
2x3=24
Divide both sides
22x3=224
Divide the numbers
x3=224
Divide the numbers
More Steps

Evaluate
224
Reduce the numbers
112
Calculate
12
x3=12
Take the 3-th root on both sides of the equation
3x3=312
Solution
x=312
Show Solution

Find the roots
x=0
Evaluate
(x2×2x−24x×16)
To find the roots of the expression,set the expression equal to 0
x2×2x−24x×16=0
Find the domain
More Steps

Evaluate
x2×2x−24=0
Multiply
More Steps

Evaluate
x2×2x
Multiply the terms with the same base by adding their exponents
x2+1×2
Add the numbers
x3×2
Use the commutative property to reorder the terms
2x3
2x3−24=0
Move the constant to the right side
2x3=24
Divide both sides
22x3=224
Divide the numbers
x3=224
Divide the numbers
More Steps

Evaluate
224
Reduce the numbers
112
Calculate
12
x3=12
Take the 3-th root on both sides of the equation
3x3=312
Calculate
x=312
x2×2x−24x×16=0,x=312
Calculate
x2×2x−24x×16=0
Multiply
More Steps

Multiply the terms
x2×2x
Multiply the terms with the same base by adding their exponents
x2+1×2
Add the numbers
x3×2
Use the commutative property to reorder the terms
2x3
2x3−24x×16=0
Use the commutative property to reorder the terms
2x3−2416x=0
Divide the terms
More Steps

Evaluate
2x3−2416x
Rewrite the fraction
2(x3−12)16x
Reduce the fraction
x3−128x
x3−128x=0
Cross multiply
8x=(x3−12)×0
Simplify the equation
8x=0
Rewrite the expression
x=0
Check if the solution is in the defined range
x=0,x=312
Solution
x=0
Show Solution
