What is expand (1,2,1,1)y(2,1,-1,3) ?

The solution to expand (1,2,1,1)y(2,1,-1,3) is 2(1*2*1*1,,,)y,1,-1*(1*2*1*1,,,)y,3

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expand (1,2,1,1)y(2,1,-1,3)

expand

(1, 2, 1, 1) y (2, 1, - 1, 3)

2 (1 \cdot 2 \cdot 1 \cdot 1,,,) y, 1, - 1 \cdot (1 \cdot 2 \cdot 1 \cdot 1,,,) y, 3

Solution steps

(1, 2, 1, 1) y (2, 1, - 1, 3)

= (1 \cdot 2 \cdot 1 \cdot 1,,,) (2 \cdot 1,, - 1 \cdot 3,) y

Apply the distributive law:

a (b - c) = ab - a c

a = (1, 2, 1, 1) y, b = 2, 1,, c = 1, 3

= (1, 2, 1, 1) y \cdot 2, 1, - (1, 2, 1, 1) y \cdot 1, 3

= 2 (1 \cdot 2 \cdot 1 \cdot 1,,,) y, 1, - 1 \cdot (1 \cdot 2 \cdot 1 \cdot 1,,,) y, 3

- \frac{5}{7} (x + 8)

(e^{5} x \cdot 5 sin (2 x) + cos (2 x) \cdot 2 e^{5} x) (- 4 sin (8 x))

\frac{s ( s + 1 )}{( s + 2 ) ( s + 3 ) ( s + 4 )}

\frac{19 x + 181}{( x + 10 ) ( x + 9 )}

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

What is expand (1,2,1,1)y(2,1,-1,3) ?
The solution to expand (1,2,1,1)y(2,1,-1,3) is 2(1*2*1*1,,,)y,1,-1*(1*2*1*1,,,)y,3