Algebra
Calculus
Trigonometry
Matrix
Question
Simplify the expression
7x5−28x4
Evaluate
7x4(x−4)
Apply the distributive property
7x4×x−7x4×4
Multiply the terms
More Steps
Evaluate
x4×x
Use the product rule an×am=an+m to simplify the expression
x4+1
Add the numbers
x5
7x5−7x4×4
Solution
7x5−28x4
Show Solution
Find the roots
x1=0,x2=4
Evaluate
7(x4)(x−4)
To find the roots of the expression,set the expression equal to 0
7(x4)(x−4)=0
Calculate
7x4(x−4)=0
Elimination the left coefficient
x4(x−4)=0
Separate the equation into 2 possible cases
x4=0x−4=0
The only way a power can be 0 is when the base equals 0
x=0x−4=0
Solve the equation
More Steps
Evaluate
x−4=0
Move the constant to the right-hand side and change its sign
x=0+4
Removing 0 doesn't change the value,so remove it from the expression
x=4
x=0x=4
Solution
x1=0,x2=4
Show Solution