What is expand (9i,-2j,-3k)(i,-6j-8k) ?

The solution to expand (9i,-2j,-3k)(i,-6j-8k) is 9i,i,-9i,6j-9i,8k-2j,i,2j,6j+2j,8k-3ik,3*6jk+3*8kk

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expand (9i,-2j,-3k)(i,-6j-8k)

expand

(9 i, - 2 j, - 3 k) (i, - 6 j - 8 k)

9 i, i, - 9 i, 6 j - 9 i, 8 k - 2 j, i, 2 j, 6 j + 2 j, 8 k - 3 ik, 3 \cdot 6 jk + 3 \cdot 8 kk

Solution steps

(9 i, - 2 j, - 3 k) (i, - 6 j - 8 k)

= (9 i, - 2, j - 3 k) (i, - 6 j - 8 k)

Distribute parentheses

= 9 i, i, 9 i, (- 6 j) + 9 i, (- 8 k) + (- 2 j,) i, (- 2 j,) (- 6 j) + (- 2 j,) (- 8 k) + (- 3 k) i, (- 3 k) (- 6 j) + (- 3 k) (- 8 k)

Apply minus-plus rules

+ (- a) = - a, (- a) (- b) = ab

= 9 i, i, - 9 i, 6 j - 9 i, 8 k - 2 j, i, 2 j, 6 j + 2 j, 8 k - 3 ik, 3 \cdot 6 jk + 3 \cdot 8 kk

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

(\frac{2 x}{3} + \frac{16}{3} = \frac{4 x}{2}) 6

\frac{12 e ^{- 2 x}}{( 1 + e ^{- 2 x} ) ^{2}}

\frac{2}{x ( x + 2 ) ^{2} ( s + 4 )}

in t er sec (c) (1, - 3)

What is expand (9i,-2j,-3k)(i,-6j-8k) ?
The solution to expand (9i,-2j,-3k)(i,-6j-8k) is 9i,i,-9i,6j-9i,8k-2j,i,2j,6j+2j,8k-3ik,3*6jk+3*8kk