Question

Sa se verifice egalitatile. Niste ajutor va rog. Multumesc!!

Answer 1

Răspuns:

buna ヅ

b)

$|(x + 4)(x + 2) - (x + 1 {}^{2} )| = 3$

$= |x {}^{2} + 2x + 4x + 8 - (x + 1)| = 3$

$= |x {}^{2} + 2x + 4x + 8 - x - 1 | = 3$

$|x {}^{2} + 5x + 7| = 3$

$x {}^{2} + 5x + 7 = 3 \\ x {}^{2} + 5x + 7 = - 3$

$x _{1} = - 4 \\ x _{2} = - 1$

c)

$|(3 - x)(x + 3) + (2 - x) {}^{2} | = 5$

$= |(3 - x) \times (3 + x) + 4 - 4x + x {}^{2} | = 5$

$= |9 - x {}^{2} + 4 - 4x + x {}^{2} | = 5$

$= |13 - 4x| = 5$

$13 - 4x = 5 \\ 13 - 4x = - 5$

$x_{1} = 2 \\ x_{2} = \frac{9}{2} = 4.5$

sper ca te am ajutat !! ≧◡≦