What is expand ((-x+15)(-x+5))/2 ?

The solution to expand ((-x+15)(-x+5))/2 is (x^2)/2-10x+75/2

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expand ((-x+15)(-x+5))/2

expand

\frac{( - x + 15 ) ( - x + 5 )}{2}

\frac{x ^{2}}{2} - 10 x + \frac{75}{2}

Solution steps

\frac{( - x + 15 ) ( - x + 5 )}{2}

Expand

(- x + 15) (- x + 5) : x^{2} - 20 x + 75

= \frac{x ^{2} - 20 x + 75}{2}

Apply the fraction rule:

\frac{a \pm b}{c} = \frac{a}{c} \pm \frac{b}{c}

\frac{x ^{2} - 20 x + 75}{2} = \frac{x ^{2}}{2} - \frac{20 x}{2} + \frac{75}{2}

= \frac{x ^{2}}{2} - \frac{20 x}{2} + \frac{75}{2}

Divide the numbers:

\frac{20}{2} = 10

= \frac{x ^{2}}{2} - 10 x + \frac{75}{2}

- 4 (x + h) - 1

\frac{( 2 x - 1 )}{s ^{2} ( s + 1 ) ^{3}}

4 a^{2} (a - b) (a + b) + b^{4}

(x + y) (d + c + e)

\frac{x}{( 14.4 - x ) ^{4}}

What is expand ((-x+15)(-x+5))/2 ?
The solution to expand ((-x+15)(-x+5))/2 is (x^2)/2-10x+75/2