What is expand (1/2 x-1/2)(1/2 x-2/5) ?

The solution to expand (1/2 x-1/2)(1/2 x-2/5) is (x^2)/4-(9x)/(20)+1/5

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expand (1/2 x-1/2)(1/2 x-2/5)

expand

(\frac{1}{2} x - \frac{1}{2}) (\frac{1}{2} x - \frac{2}{5})

\frac{x ^{2}}{4} - \frac{9 x}{20} + \frac{1}{5}

Solution steps

(\frac{1}{2} x - \frac{1}{2}) (\frac{1}{2} x - \frac{2}{5})

Apply FOIL method

(\frac{1}{2} x - \frac{1}{2}) (\frac{1}{2} x - \frac{2}{5}) : \frac{x ^{2}}{4} - \frac{9 x}{20} + \frac{1}{5}

= \frac{x ^{2}}{4} - \frac{9 x}{20} + \frac{1}{5}

\frac{s}{( s - 4 ) ( s - 5 ) ( s - 20 )}

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

x (x + 3) (x - 3)

A (2, 7) B (- 6, - 9)

(x - \frac{8}{3})^{2}

What is expand (1/2 x-1/2)(1/2 x-2/5) ?
The solution to expand (1/2 x-1/2)(1/2 x-2/5) is (x^2)/4-(9x)/(20)+1/5