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(2x + 1)^2 + (3x-1)^2 URGEENT MS

Răspuns :

Roves

[tex](2x + 1) {}^{2} = 4x {}^{2} + 4x + 1 \\ (3x - 1) {}^{2} = 9x {}^{2} - 6x + 1 \\ 4x {}^{2} + 4x + 1 + 9x {}^{2} - 6x + 1 = \\ 13x {}^{2} - 2x + 2 = \\ x(13x - 2) + 2[/tex]
[tex]4x {}^{2} + 4x + 1 + 9x {}^{2} - 6x + 1 \\ = 13x {}^{2} - 2
x + 2[/tex]
asta e tot. e lectia descompuneri in factori nu?

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