Algebra
Calculus
Trigonometry
Matrix
Question
Simplify the expression
−21x
Evaluate
21x−x
Collect like terms by calculating the sum or difference of their coefficients
(21−1)x
Solution
More Steps
Evaluate
21−1
Reduce fractions to a common denominator
21−22
Write all numerators above the common denominator
21−2
Subtract the numbers
2−1
Use b−a=−ba=−ba to rewrite the fraction
−21
−21x
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Find the roots
x=0
Evaluate
21x−x
To find the roots of the expression,set the expression equal to 0
21x−x=0
Subtract the terms
More Steps
Simplify
21x−x
Collect like terms by calculating the sum or difference of their coefficients
(21−1)x
Subtract the numbers
More Steps
Evaluate
21−1
Reduce fractions to a common denominator
21−22
Write all numerators above the common denominator
21−2
Subtract the numbers
2−1
Use b−a=−ba=−ba to rewrite the fraction
−21
−21x
−21x=0
Change the signs on both sides of the equation
21x=0
Solution
x=0
Show Solution