Algebra
Calculus
Trigonometry
Matrix
Question
Simplify the expression
7x2−21x
Evaluate
(x−3)(x×7)
Remove the parentheses
(x−3)x×7
Use the commutative property to reorder the terms
(x−3)×7x
Multiply the terms
7x(x−3)
Apply the distributive property
7x×x−7x×3
Multiply the terms
7x2−7x×3
Solution
7x2−21x
Show Solution
Find the roots
x1=0,x2=3
Evaluate
(x−3)(x×7)
To find the roots of the expression,set the expression equal to 0
(x−3)(x×7)=0
Use the commutative property to reorder the terms
(x−3)×7x=0
Multiply the terms
7x(x−3)=0
Elimination the left coefficient
x(x−3)=0
Separate the equation into 2 possible cases
x=0x−3=0
Solve the equation
More Steps
Evaluate
x−3=0
Move the constant to the right-hand side and change its sign
x=0+3
Removing 0 doesn't change the value,so remove it from the expression
x=3
x=0x=3
Solution
x1=0,x2=3
Show Solution