13) x^2 - 6x + 5 = 0
D=36-4×5=36-20=16
X12=6+-4/2=5 и 1
14) x^2-9x+18=0
D=81-4×18=9
X12=9+-3/2= 6 и 3
15) x^2-10x+24=0
D=100-4×24=4
X12=10+-2/2=6 и 4
13) x^2 - 6x + 5 = 0
D=36-4×5=36-20=16
X12=6+-4/2=5 и 1
14) x^2-9x+18=0
D=81-4×18=9
X12=9+-3/2= 6 и 3
15) x^2-10x+24=0
D=100-4×24=4
X12=10+-2/2=6 и 4