Question

Este super usor!!! Ajutati.ma sa.l rezolv!! Nush ce trebuie sa fac! Exercitiul 5!! Multumesc anticipat!! Dau coroana si multumiri!!!!!va rog!!! Imi trebuie reped!!!!!

Answer 1

$(x + 2)(x - 3) - 2(x + 5) {}^{2} = x(4 - x) = > {x}^{2} - 3x + 2x - 6 - 2( {x}^{2} + 10x + 25) = 4x - {x}^{2} = > {x}^{2} - 3x + 2x - 6 - 2x {}^{2} - 20x - 50 = 4x - x {}^{2} = > - {x}^{2} - 21x - 56 = 4x - {x}^{2} = > - 21x - 56 = 4x = > - 21x - 4x = 56 = > - 25x = 56 = > x = - \frac{56}{25}$

Answer 2

$(x + 2)(x - 3) - 2(x + 5) {}^{2} = x(4 - x) = > {x}^{2} - 3x + 2x - 6 - 2( {x}^{2} + 10x + 25) = 4x - {x}^{2} = > {x}^{2} - 3x + 2x - 6 - 2x {}^{2} - 20x - 50 = 4x - x {}^{2} = > - {x}^{2} - 21x - 56 = 4x - {x}^{2} = > - 21x - 56 = 4x = > - 21x - 4x = 56 = > - 25x = 56 = > x = - \frac{56}{25}$

Answer 3

$(x + 2)(x - 3) - 2(x + 5) {}^{2} = x(4 - x) = > {x}^{2} - 3x + 2x - 6 - 2( {x}^{2} + 10x + 25) = 4x - {x}^{2} = > {x}^{2} - 3x + 2x - 6 - 2x {}^{2} - 20x - 50 = 4x - x {}^{2} = > - {x}^{2} - 21x - 56 = 4x - {x}^{2} = > - 21x - 56 = 4x = > - 21x - 4x = 56 = > - 25x = 56 = > x = - \frac{56}{25}$