Whakaoti mō A
A = -\frac{5}{2} = -2\frac{1}{2} = -2.5
Tohaina
Kua tāruatia ki te papatopenga
-2A=5
Me whakarea ngā taha e rua o te whārite ki te 4, arā, te tauraro pātahi he tino iti rawa te kitea o 2,4.
A=\frac{5}{-2}
Whakawehea ngā taha e rua ki te -2.
A=-\frac{5}{2}
Ka taea te hautanga \frac{5}{-2} te tuhi anō ko -\frac{5}{2} mā te tango i te tohu tōraro.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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