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4-\frac{5}{-21}=4
Multiply 3 and -7 to get -21.
4-\left(-\frac{5}{21}\right)=4
Fraction \frac{5}{-21} can be rewritten as -\frac{5}{21} by extracting the negative sign.
4+\frac{5}{21}=4
The opposite of -\frac{5}{21} is \frac{5}{21}.
\frac{84}{21}+\frac{5}{21}=4
Convert 4 to fraction \frac{84}{21}.
\frac{84+5}{21}=4
Since \frac{84}{21} and \frac{5}{21} have the same denominator, add them by adding their numerators.
\frac{89}{21}=4
Add 84 and 5 to get 89.
\frac{89}{21}=\frac{84}{21}
Convert 4 to fraction \frac{84}{21}.
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Compare \frac{89}{21} and \frac{84}{21}.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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