if A=(-2icap +3jcap-4kcap) and B= 3icap-4jcap+5kcap find a×b and a.b
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a.b = -2 * 3 i^ + 3*-4 j^ + -4*5k^
= -6 + ( -12} ) + (-20 )
= - 38
a×b = √ -6^2 + -12^2 + -20^2
=√36+144+400
= √580 =2√145
= -6 + ( -12} ) + (-20 )
= - 38
a×b = √ -6^2 + -12^2 + -20^2
=√36+144+400
= √580 =2√145
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