Question

(x-3)(x + 3)(x²+9)-(x²+2)²+2(x+2)²​

Answer 1

Răspuns:

Cu putina (sau mai multa) atentie, efectuam calculul:

$(x - 3)(x + 3)( {x}^{2} + 9) - ( {x}^{2} + 2)^{2} + 2(x + 2)^{2} = \\ \\ ( {x}^{2} - 9)( {x}^{2} + 9) - ( {x}^{4} + 4 {x}^{2} + 4) + 2( {x}^{2} + 4x + 4) = \\ \\ = {x}^{4} - 81 - {x}^{4} - 4 {x}^{2} - 4 + 2 {x}^{2} + 8x + 8 = \\ \\ = 8x - 2 {x}^{2} - 77$

Succes! ♡︎♥︎♡︎