What is expand (3,1,2)(2,3,7)y(1,-3,8) ?

The solution to expand (3,1,2)(2,3,7)y(1,-3,8) is 1*(3*1*2,,)(2*3*7,,)y,-3(3*1*2,,)(2*3*7,,)y,8

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expand (3,1,2)(2,3,7)y(1,-3,8)

expand

(3, 1, 2) (2, 3, 7) y (1, - 3, 8)

1 \cdot (3 \cdot 1 \cdot 2,,) (2 \cdot 3 \cdot 7,,) y, - 3 (3 \cdot 1 \cdot 2,,) (2 \cdot 3 \cdot 7,,) y, 8

Solution steps

(3, 1, 2) (2, 3, 7) y (1, - 3, 8)

= (3 \cdot 1 \cdot 2,,) (2 \cdot 3 \cdot 7,,) (1, - 3 \cdot 8,) y

Apply the distributive law:

a (b - c) = ab - a c

a = (3, 1, 2) (2, 3, 7) y, b = 1,, c = 3, 8

= (3, 1, 2) (2, 3, 7) y \cdot 1, - (3, 1, 2) (2, 3, 7) y \cdot 3, 8

= 1 \cdot (3 \cdot 1 \cdot 2,,) (2 \cdot 3 \cdot 7,,) y, - 3 (3 \cdot 1 \cdot 2,,) (2 \cdot 3 \cdot 7,,) y, 8

\frac{48 x ^{2} + 72 x + 45}{( 4 x + 15 ) ^{6}}

(2 u, 2 v, 1) (9 - u^{2} - v^{2}, 9 - u^{2} - v^{2}, u)

(1 - p \cdot cos (x) + x \cdot p \cdot cos (x))^{2}

(x - 3 i) (x + 3 i)

- n (δ + x y) x

What is expand (3,1,2)(2,3,7)y(1,-3,8) ?
The solution to expand (3,1,2)(2,3,7)y(1,-3,8) is 1*(3*1*2,,)(2*3*7,,)y,-3(3*1*2,,)(2*3*7,,)y,8