Question

Rozwiąż równianie. POMOCY DAJE NAJ I 20 PKT :3333​

Answer 1

1.

∆=b^2-(4ac)

∆=-5^2-(4*1*-14)

∆=81

√∆=9

x1= (4-9)/(2*-5)= 1/2

x2= (4+9)/(2*-5)= -13/10

2.

∆=-2^2-(4*-1*15)

∆=64

√∆=8

x1= (2-8)/(2*-1)=3

x2=(2+8)/-2=-5

3.

∆=4-(4*-4*-5)

∆=-76

√∆=-2√19

x1= (-2+2√19)/(2*-4)= √19/-8

x2= (-2-2√19)/(2*-4)= 1/2√19