I guess you mean A cross B
i ... j ... k
ax ay az
bx by bz
= (ay bz - az by) i + (az bx - ax bz) j + (ax by - ay bx) k
so
ay bz - az by = 8
az bx - ax bz = -14
ax by - ay bx = 1
and
ax + bx = 5 so bx = 5 - ax
ay + by = 3 so by = 3 - ay
az + bz = 2 so bz = 2 - az
plug and chug
if a x b = 8i - 14j + k and a + b = 5i + 3j + 2k , find a and b
1 answer