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Tohaina

2\left(16-56x+49x^{2}\right)+5
Whakamahia te ture huarua \left(a-b\right)^{2}=a^{2}-2ab+b^{2} hei whakaroha \left(4-7x\right)^{2}.
32-112x+98x^{2}+5
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te 16-56x+49x^{2}.
37-112x+98x^{2}
Tāpirihia te 32 ki te 5, ka 37.
2\left(16-56x+49x^{2}\right)+5
Whakamahia te ture huarua \left(a-b\right)^{2}=a^{2}-2ab+b^{2} hei whakaroha \left(4-7x\right)^{2}.
32-112x+98x^{2}+5
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te 16-56x+49x^{2}.
37-112x+98x^{2}
Tāpirihia te 32 ki te 5, ka 37.