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Popular >

simplify (3x-21)/(x^2-49)

Solution

simplify

\frac{3 x - 21}{x ^{2} - 49}

Solution

\frac{3}{x + 7}

Solution steps

\frac{3 x - 21}{x ^{2} - 49}

Factor

3 x - 21 : 3 (x - 7)

= \frac{3 ( x - 7 )}{x ^{2} - 49}

Factor

x^{2} - 49 : (x + 7) (x - 7)

= \frac{3 ( x - 7 )}{( x + 7 ) ( x - 7 )}

Cancel the common factor:

x - 7

= \frac{3}{x + 7}

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Frequently Asked Questions (FAQ)

What is (3x-21)/(x^2-49) ?
The solution to (3x-21)/(x^2-49) is 3/(x+7)