Răspuns:
buna ヅ
b)
[tex] |(x + 4)(x + 2) - (x + 1 {}^{2} )| = 3[/tex]
[tex] = |x {}^{2} + 2x + 4x + 8 - (x + 1)| = 3[/tex]
[tex] = |x {}^{2} + 2x + 4x + 8 - x - 1 | = 3[/tex]
[tex] |x {}^{2} + 5x + 7| = 3[/tex]
[tex]x {}^{2} + 5x + 7 = 3 \\ x {}^{2} + 5x + 7 = - 3[/tex]
[tex] x _{1} = - 4 \\ x _{2} = - 1[/tex]
c)
[tex] |(3 - x)(x + 3) + (2 - x) {}^{2} | = 5[/tex]
[tex] = |(3 - x) \times (3 + x) + 4 - 4x + x {}^{2} | = 5[/tex]
[tex] = |9 - x {}^{2} + 4 - 4x + x {}^{2} | = 5[/tex]
[tex] = |13 - 4x| = 5[/tex]
[tex]13 - 4x = 5 \\ 13 - 4x = - 5[/tex]
[tex] x_{1} = 2 \\ x_{2} = \frac{9}{2} = 4.5[/tex]
sper ca te am ajutat !! ≧◡≦
