What is expand (x+4)/((x-7)(x+3)) ?

The solution to expand (x+4)/((x-7)(x+3)) is (x+4)/(x^2-4x-21)

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expand (x+4)/((x-7)(x+3))

expand

\frac{x + 4}{( x - 7 ) ( x + 3 )}

\frac{x + 4}{x ^{2} - 4 x - 21}

Solution steps

\frac{x + 4}{( x - 7 ) ( x + 3 )}

Expand

(x - 7) (x + 3) : x^{2} - 4 x - 21

= \frac{x + 4}{x ^{2} - 4 x - 21}

\frac{( x + 5 ) ^{2}}{x ^{2} + 25}

\frac{a ^{2} + 2 ab + b}{( a + b ) ^{2}}

\frac{x ( 1 + e ^{- x} )}{1 - e ^{- x}}

f (3, - \frac{3}{4})

- (x^{2} - 1) (x + Δ x + 5)

What is expand (x+4)/((x-7)(x+3)) ?
The solution to expand (x+4)/((x-7)(x+3)) is (x+4)/(x^2-4x-21)