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Whakaroha
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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

9\left(x^{2}-2x+1\right)-25
Whakamahia te ture huarua \left(a-b\right)^{2}=a^{2}-2ab+b^{2} hei whakaroha \left(x-1\right)^{2}.
9x^{2}-18x+9-25
Whakamahia te āhuatanga tohatoha hei whakarea te 9 ki te x^{2}-2x+1.
9x^{2}-18x-16
Tangohia te 25 i te 9, ka -16.
9\left(x^{2}-2x+1\right)-25
Whakamahia te ture huarua \left(a-b\right)^{2}=a^{2}-2ab+b^{2} hei whakaroha \left(x-1\right)^{2}.
9x^{2}-18x+9-25
Whakamahia te āhuatanga tohatoha hei whakarea te 9 ki te x^{2}-2x+1.
9x^{2}-18x-16
Tangohia te 25 i te 9, ka -16.