Question

Se dau expresiile A(x)=$x^{2}$-5x+6,B(x)=$x^{3}$-4x.
a) Calculati$m_{a}$si $m_{g}$ a numerelor A(4) si B(4)
b) Stabiliti daca A($\sqrt{3}$)∈(-∞;1]
c) Descompuneti in factori expresiile date 
d) Rezolvati ecuatia x·A(x):B(x)=6  
va rog ajutatima

Answer 1

A(4)=4²-5*4+6=16-20+6=2
B(4)=4³-4*4=64-16=48
ma=2+48/2
ma=50/2
ma=25
mg=√2+48
mg=√50
mg=5√2
b)  A(√3)=(√3)²-5*√3+6=3-5√3+6=9-5√3
c)  x*x²-4x+6:x³-4x=x³-4x²+6x:x³-4x=-4x²+6x:-4x
atat am stiut sper ca ti am fost de ajutor