Whakaoti mō x
x = -\frac{21}{2} = -10\frac{1}{2} = -10.5
Graph
Tohaina
Kua tāruatia ki te papatopenga
28x+44\left(0-x\right)=168
Whakareatia te 0 ki te 4, ka 0.
28x+44\left(-1\right)x=168
Ko te tau i tāpiria he kore ka hua koia tonu.
28x-44x=168
Whakareatia te 44 ki te -1, ka -44.
-16x=168
Pahekotia te 28x me -44x, ka -16x.
x=\frac{168}{-16}
Whakawehea ngā taha e rua ki te -16.
x=-\frac{21}{2}
Whakahekea te hautanga \frac{168}{-16} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 8.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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