Algebra
Calculus
Trigonometry
Matrix
Question
Simplify the expression
28x3−196x
Evaluate
(4x×7)(x2−7)
Remove the parentheses
4x×7(x2−7)
Multiply the terms
28x(x2−7)
Apply the distributive property
28x×x2−28x×7
Multiply the terms
More Steps
Evaluate
x×x2
Use the product rule an×am=an+m to simplify the expression
x1+2
Add the numbers
x3
28x3−28x×7
Solution
28x3−196x
Show Solution
Find the roots
x1=−7,x2=0,x3=7
Alternative Form
x1≈−2.645751,x2=0,x3≈2.645751
Evaluate
(4x×7)(x2−7)
To find the roots of the expression,set the expression equal to 0
(4x×7)(x2−7)=0
Multiply the terms
28x(x2−7)=0
Elimination the left coefficient
x(x2−7)=0
Separate the equation into 2 possible cases
x=0x2−7=0
Solve the equation
More Steps
Evaluate
x2−7=0
Move the constant to the right-hand side and change its sign
x2=0+7
Removing 0 doesn't change the value,so remove it from the expression
x2=7
Take the root of both sides of the equation and remember to use both positive and negative roots
x=±7
Separate the equation into 2 possible cases
x=7x=−7
x=0x=7x=−7
Solution
x1=−7,x2=0,x3=7
Alternative Form
x1≈−2.645751,x2=0,x3≈2.645751
Show Solution