Content deleted Content added
→Definitions: Added proofs Tags: Reverted Visual edit |
m →Proofs Tags: Reverted Visual edit |
||
Line 127:
<math display="block">-(a\cdot -b) = -(-(a\cdot b)) .</math>
That is, <math display="inline">- (a\cdot -b)</math> is the additive inverse of <math>-(a\cdot b)</math>, which is also equal to <math>ab</math>. Hence,
<math display="block">(-a)(-b)=ab.</math></ref>
| |||