Question

Sa se rezolve ecuatiile irationale:
a) √x-3=5-x
b) √3x-5=2
c) √x=4=2√3
d)∛x³+x²-x-2=x

Dau coroana.

Answer 1

Răspuns:

a) √x-3=5-x

√x=8-x | ridicam la patrat

x= 64-16x+x²

x²-17x+64=0

∆=289-256

∆=33

x1 = (-17+√33)/2

x2 = (-17-√33)/2