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Problemi Simili mit-Tiftix tal-Web

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2\left(1+2x+x^{2}\right)-2\times 42
Uża teorema binomjali \left(a+b\right)^{2}=a^{2}+2ab+b^{2} biex tespandi \left(1+x\right)^{2}.
2+4x+2x^{2}-2\times 42
Uża l-propjetà distributtiva biex timmultiplika 2 b'1+2x+x^{2}.
2+4x+2x^{2}-84
Immultiplika 2 u 42 biex tikseb 84.
-82+4x+2x^{2}
Naqqas 84 minn 2 biex tikseb -82.
2\left(1+2x+x^{2}\right)-2\times 42
Uża teorema binomjali \left(a+b\right)^{2}=a^{2}+2ab+b^{2} biex tespandi \left(1+x\right)^{2}.
2+4x+2x^{2}-2\times 42
Uża l-propjetà distributtiva biex timmultiplika 2 b'1+2x+x^{2}.
2+4x+2x^{2}-84
Immultiplika 2 u 42 biex tikseb 84.
-82+4x+2x^{2}
Naqqas 84 minn 2 biex tikseb -82.