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x^{2}-4x+4=\left(x+6\right)^{2}
Whakamahia te ture huarua \left(a-b\right)^{2}=a^{2}-2ab+b^{2} hei whakaroha \left(x-2\right)^{2}.
x^{2}-4x+4=x^{2}+12x+36
Whakamahia te ture huarua \left(a+b\right)^{2}=a^{2}+2ab+b^{2} hei whakaroha \left(x+6\right)^{2}.
x^{2}-4x+4-x^{2}=12x+36
Tangohia te x^{2} mai i ngā taha e rua.
-4x+4=12x+36
Pahekotia te x^{2} me -x^{2}, ka 0.
-4x+4-12x=36
Tangohia te 12x mai i ngā taha e rua.
-16x+4=36
Pahekotia te -4x me -12x, ka -16x.
-16x=36-4
Tangohia te 4 mai i ngā taha e rua.
-16x=32
Tangohia te 4 i te 36, ka 32.
x=\frac{32}{-16}
Whakawehea ngā taha e rua ki te -16.
x=-2
Whakawehea te 32 ki te -16, kia riro ko -2.