1) 2x^2 - 7х + 6 = 0
D=b^2-4ac=(-7)^2-4*2*6=49-48=1
x1=(-b+-√D)/(2a)=7+1/4=8/4=2
x2=7-1/4=6/4=1,5
2) х^2 + 6х +9 = 0
x1*x2=9 x1=-3
x1+x2=-6 x2=-3
1) 2•2-7х+6=0
4-7+6=0
10-7х=0
-7=-10
х=10/7
2) х2+6х+9-0
2+6х+9
11+6х
1) 2x^2 - 7х + 6 = 0
D=b^2-4ac=(-7)^2-4*2*6=49-48=1
x1=(-b+-√D)/(2a)=7+1/4=8/4=2
x2=7-1/4=6/4=1,5
2) х^2 + 6х +9 = 0
x1*x2=9 x1=-3
x1+x2=-6 x2=-3
1) 2•2-7х+6=0
4-7+6=0
10-7х=0
-7=-10
х=10/7
2) х2+6х+9-0
2+6х+9
11+6х