Question

Find out vector product of 3i+8j-5k and -2i+9j+7k.​

Answer 1

9514 1404 393

Answer:

101i -11j +43k

Explanation:

A suitable calculator can find the cross product for you, or you can evaluate the determinant ...

`\left|\begin{array}{ccc}i&j&k\\3&8&-5\\-2&9&7\end{array}\right|=i(8\cdot7-9(-5))-j(3\cdot7-(-2)(-5))+k(3\cdot9-(-2)(8))\\\\=\boxed{101i-11j+43k}`