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Problemi Simili mit-Tiftix tal-Web

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81-\left(x^{2}+2x+1\right)
Uża teorema binomjali \left(a+b\right)^{2}=a^{2}+2ab+b^{2} biex tespandi \left(x+1\right)^{2}.
81-x^{2}-2x-1
Biex issib l-oppost ta' x^{2}+2x+1, sib l-oppost ta' kull terminu.
80-x^{2}-2x
Naqqas 1 minn 81 biex tikseb 80.
81-\left(x^{2}+2x+1\right)
Uża teorema binomjali \left(a+b\right)^{2}=a^{2}+2ab+b^{2} biex tespandi \left(x+1\right)^{2}.
81-x^{2}-2x-1
Biex issib l-oppost ta' x^{2}+2x+1, sib l-oppost ta' kull terminu.
80-x^{2}-2x
Naqqas 1 minn 81 biex tikseb 80.