joles2
joles2
25-08-2017
Mathematics
contestada
a,(-a)^2=a^2 This is true or false?
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jdoe0001
jdoe0001
25-08-2017
[tex]\bf (-a)^2\implies (-a)(-a)\impliedby \textit{recall \underline{minus} times \underline{minus} is \underline{plus}} \\\\\\ -1(a)\cdot -1(a)\implies (-1\cdot -1)(a)(a)\implies +1(a)(a)\implies a^2[/tex]
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