Question

Dau coroana
Rezolvati ecuatiile:
a) (2x²-5x-12)(x²-2)=0
b) (3x²+2x-5)(4x²-5x+1)=0
c) $\frac{ x^{2} + 5}{ x^{2} + x + 1}$ - 2=0
Am nevoie de ajutor. Multumesc.

Answer 1

Rezolvati ecuatiile :
a) [tex](2 x^{2} -5x-12)( x^{2} -2)= 0 [/tex] ⇒
$x^{2} -2=0$
$x^{2} =2$
⇒$x=+- \sqrt{2}$