# physics

posted by
**tae**
.

If d1 = 7 ihat - 2 jhat + 4 khat and d2 = -5 ihat + 2 jhat - khat, then what is (d1 + d2)ยท(d1 multiplied by 6 d2)?

posted by
**tae**
.

If d1 = 7 ihat - 2 jhat + 4 khat and d2 = -5 ihat + 2 jhat - khat, then what is (d1 + d2)ยท(d1 multiplied by 6 d2)?