1)1; -3/7
2)2/3; -1/2
Объяснение:
1) D=(-4)²-4×7×(-3)=16+84=100
x1 = (4+√100)÷(2×7)=14÷14=1;
x2 = (4-√100)÷(2×7)=-6÷14=-3/7
2) D=(-1)²-4×6×(-2)=1+48=49
x1 = (1+√49)÷(2×6)=8÷12=2/3.
x2 = (1-√49)÷(2×6)=-6÷12=-1/2
1)1; -3/7
2)2/3; -1/2
Объяснение:
1) D=(-4)²-4×7×(-3)=16+84=100
x1 = (4+√100)÷(2×7)=14÷14=1;
x2 = (4-√100)÷(2×7)=-6÷14=-3/7
2) D=(-1)²-4×6×(-2)=1+48=49
x1 = (1+√49)÷(2×6)=8÷12=2/3.
x2 = (1-√49)÷(2×6)=-6÷12=-1/2